Opinion polling for the 2020 Republican Party presidential primaries explained

This is a list of nationwide and statewide public opinion polls that have been conducted relating to the Republican primaries for the 2020 United States presidential election. The persons named in the polls are declared candidates or have received media speculation about their possible candidacy. The polls included are among Republicans or Republicans and Republican-leaning independents. If multiple versions of polls are provided, the version among likely voters is prioritized, then registered voters, then adults.

National polling

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Donald Trump	Bill Weld	Joe Walsh	Other and undecided
270 to Win^[1]	Feb 19, 2020	,Feb 18 – 19, 2020		91.0%	5.0%	-
RealClearPolitics^[2]	Feb 11, 2020	Dec 10, 2019 – Feb 11, 2020		89.3%	4.0%	3.5%
Average				90.2%	4.5%	3.5%	1.8%

From February 2020

Poll source	Date(s) administered	Sample size	Margin	Rocky De La Fuente	Donald Trump	Bill Weld	Other	Undecided
Emerson College^[3]	Mar 18–19	423 (LV)	–	–		94%	6%	–	–
	Mar 18	Weld withdraws from the race
	Mar 17	Florida and Illinois primaries; Trump becomes presumptive nominee
	Mar 11	COVID-19 declared a pandemic by the World Health Organization; national emergency declared Mar 13
	Mar 10	Idaho, Michigan, Mississippi, Missouri and Washington primaries
	Mar 3	Super Tuesday
YouGov/Economist^[4]	Mar 1–3	232 (LV)	–	1%		94%	2%	0%	2%
YouGov/Economist^[5]	Feb 23–25	385 (LV)	–	1%		92%	2%	1%	3%
YouGov/Economist^[6]	Feb 17–18	358 (LV)	–	2%		91%	1%	0%	5%
Emerson College^[7]	Feb 16–18	482 (LV)	–	–		91%	9%	–	–
YouGov/Yahoo News^[8]	Feb 12–13	610 (LV)	–	–		82%	–	13%	4%
	Feb 11	New Hampshire primary
YouGov/Economist^[9]	Feb 9–11	349 (LV)	–	2%		90%	5%	1%	2%
	Feb 7	Walsh withdraws from the race
McLaughlin & Associates^[10]	Feb 7–11	479 (LV)	–	–		87%	6%	0%	7%
YouGov/Economist^[11]	Feb 2–4	401 (LV)	–	0%		89%	1%	3%	7%
	Feb 3	Iowa caucuses

From December 2019 to January 2020

Poll source	Date(s) administered	Sample size	Margin	Rocky De La Fuente	Donald Trump		Bill Weld	Other	Undecided
YouGov/Economist^[12]	Jan 26–28	384 (LV)	–	1%		89%	3%	2%	1%	4%
Emerson College^[13]	Jan 21–23	412 (LV)	–	–		92%	2%	6%	–	–
YouGov/Economist^[14]	Jan 19–21	459 (LV)	–	1%		89%	2%	2%	2%	4%
YouGov/Economist^[15]	Jan 11–14	362 (LV)	–	1%		88%	1%	1%	1%	9%
YouGov/The Economist^[16]	Jan 5–7	399 (LV)	–	1%		87%	1%	2%	1%	7%
YouGov/The Economist^[17]	Dec 28–31	359 (LV)	–	1%		89%	1%	2%	1%	6%
YouGov/Economist^[18]	Dec 22–24	415 (LV)	–	1%		91%	2%	1%	0%	5%
McLaughlin & Associates^[19]	Dec 14–18	399 (LV)	–	–		83%	2%	3%	0%	11%
Emerson College^[20]	Dec 15–17	492 (LV)	–	–		90%	5%	5%	–	–
YouGov/Economist^[21]	Dec 14–17	354 (LV)	–	1%		88%	2%	2%	0%	7%
Suffolk University^[22]	Dec 10–14	329 (LV)	–	–		88%	2%	2%	0%	7%
YouGov/Economist^[23]	Dec 7–10	422 (LV)	–	–		88%	2%	2%	1%	8%
YouGov/Economist^[24]	Dec 1–3	417 (LV)	–	–		89%	2%	3%	–	6%

June 2019 to November 2019

Poll source	Date(s) administered	Sample size	Margin	Mark Sanford	Donald Trump		Bill Weld	Other	Undecided
YouGov/Economist^[25]	Nov 24–26	402 (LV)	–	–		89%	2%	3%	1%	6%
RealClear Opinion Research^[26]	Nov 15–21	780 (LV)	–	–		89%	6%	1%	–	11%
Emerson College^[27]	Nov 17–20	426 (LV)	–	–		93%	4%	3%	–	–
YouGov/Economist^[28]	Nov 17–19	383 (LV)	–	–		90%	2%	1%	–	7%
	Nov 12	Sanford withdraws from the race
YouGov/Economist^[29]	Nov 10–12	352 (LV)	–	3%		89%	1%	1%	1%	5%
YouGov/Economist^[30]	Nov 3–5	402 (LV)	–	1%		87%	1%	3%	1%	8%
YouGov/Economist^[31]	Oct 27–29	464 (LV)	–	3%		83%	2%	2%	1%	9%
Suffolk University/USA Today^[32] https://eu.usatoday.com/story/news/politics/elections/2019/10/30/poll-biden-slips-warren-rises-sanders-buttigieg-top-tier/4096461002/	Oct 23–26	323 (LV)	± 5.5%	1%		85%	1%	2%	–	11%
YouGov/Economist^[33]	Oct 20–22	404 (LV)	–	3%		87%	1%	1%	1%	8%
McLaughlin and Associates^[34]	Oct 17–22	411	–	1%		76%	1%	2%	9%	12%
Emerson College^[35]	Oct 18–21	378	± 4.9%	3%		91%	2%	5%	–	–
Ipsos^[36]	Oct 17–18	507	± 5.7%	1%		79%	1%	1%	8%	11%
YouGov/Economist^[37]	Oct 10–13	354	–	2%		86%	2%	3%	–	5%
YouGov/Economist^[38]	Oct 6–8	473	± 2.9%	1%		84%	3%	3%	–	8%
YouGov/Economist^[39]	Sep 28 – Oct 1	360	± 2.6%	3%		86%	2%	2%	–	7%
Quinnipiac University^[40]	Sep 19–23	568	± 4.9%	2%		80%	2%	2%	1%	12%
Emerson College^[41]	Sep 21–23	363	± 5.1%	3%		89%	5%	4%	–	–
Fox News^[42]	Sep 15–17	341	± 5.0%	2%		86%	2%	2%	1%	5%
YouGov/Economist^[43]	Sep 14–17	416	± 2.7%	2%		86%	1%	5%	1%	5%
Emerson College^[44]	Sep 13–16	208	± 3.3%	6%		86%	4%	4%	–	–
Public Religion Research Institute^[45]	Aug 22 – Sep 15	957	± 2.8%	–		74%	–	10%	13%	3%
HarrisX^[46]	Sep 9–12	1,175	–	2%		76%	2%	2%	4%	14%
Democracy Corps^[47]	Sep 7–11	315	–	4%		85%	5%	2%	1%	4%
YouGov/Economist^[48]	Sep 8–10	393	± 2.7%	3%		82%	1%	4%	2%	7%
McLaughlin & Associates^[49]	Sep 7–10	416	–	3%		76%	1%	3%	–	17%
	Sep 8	Sanford announces his candidacy
Emerson College^[50]	Aug 24–26	482	± 2.5%	–		84%	–	16%	–	–
HarrisX^[51]	Aug 23–26	1,194	–	–		76%	5%	3%	6%	10%
	Aug 25	Walsh announces his candidacy
Suffolk University^[52]	Aug 20–25	289	–	–		90%	–	5%	–	5%
McLaughlin & Associates^[53]	Jul 23–28	415	± 4.0%	4%		81%	–	2%	–	14%
Democracy Corps^[54]	Jul 18–28	354	± 4.0%	4%		89%	–	4%	–	3%
Emerson College^[55]	Jun 21–24	407	± 4.9%	–		83%	–	17%	–	–
McLaughlin & Associates^[56]	Jun 18–24	417	-	–		79%	–	7%	–	13%
Suffolk University/USA Today^[57]	Jun 11–15	326	–	–		90%	–	5%	–	5%

November 2018 to May 2019

Poll source	Date(s) administered	Sample size	Margin	Jeb Bush	Bob Corker	Ted Cruz	Jamie Dimon	Jeff Flake	Nikki Haley	Larry Hogan	John Kasich	Mike Pence	Mitt Romney	Paul Ryan	Ben Sasse	Donald Trump	Bill Weld	Other	Undecided
HarrisX^[58]	May 23–25	785	± 4.0%	–	–	–	–	–	–	–	–	–	–	–	–		73%	7%	5%	13%
Change Research^[59]	May 18–21	1,248	± 2.8%	–	2%	–	–	–	–	–	–	–	–	–	–		94%	–	–	4%
				–	–	–	–	–	7%	–	–	–	–	–	–		87%	–	–	6%
				–	–	–	–	–	–	–	3%	–	–	–	–		94%	–	–	3%
	May 16	De La Fuente announces his candidacy
Emerson College^[60]	May 10–13	384	± 5.0%	–	–	–	–	–	–	–	–	–	–	–	–		86%	14%	–	–
McLaughlin & Associates^[61]	May 7–11	330	–	–	–	–	–	–	–	1%	5%	–	–	–	–		77%	3%	–	14%
Zogby Analytics^[62]	May 2–9	463	–	–	–	–	–	–	–	–	–	–	–	–	–		81%	4%	10%	6%
Quinnipiac University^[63]	Apr 26–29	419	± 5.6%	–	–	–	–	–	–	3%	–	–	–	–	–		84%	3%	1%	8%
HarrisX^[64]	Apr 26–28	641	± 4.0%	–	–	–	–	–	–	–	–	–	–	–	–		75%	7%	4%	11%
Morning Consult^[65]	Apr 19–21	641	± 4.0%	–	–	–	–	–	–	–	–	–	–	–	–		78%	7%	–	15%
Ipsos/Reuters^[66]	Apr 18–19	344	± 5.9%	–	–	–	1%	1%	5%	–	4%	10%	–	–	–		60%	–	2%	16%
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College^[67]	Apr 11–14	324	± 5.4%	–	–	–	–	–	–	–	–	–	–	–	–		85%	15%	–	–
Ipsos/Reuters^[68]	Mar 25–26	362	± 5.9%	–	–	–	1%	0%	3%	–	5%	8%	–	–	–		63%	–	4%	16%
Morning Consult^[69]	Mar 22–24	638	± 4.0%	–	–	–	–	–	–	9%	–	–	–	–	–		73%	–	–	18%
				–	–	–	–	–	–	–	13%	–	–	–	–		72%	–	–	16%
				–	–	–	–	–	–	–	–	–	–	–	–		74%	8%	–	18%
McLaughlin & Associates^[70]	Mar 20–24	418	–	–	–	–	–	–	–	–	5%	–	–	–	–		80%	1%	–	14%
Emerson College^[71]	Mar 17–18	483	–	–	–	–	–	–	–	–	–	–	–	–	–		90%	10%	–	–
Ipsos/Reuters^[72]	Mar 5–11	756	± 4.1%	–	1%	–	0%	0%	3%	–	3%	–	9%	–	0%		69%	–	2%	13%
Monmouth University^[73]	Mar 1–4	339	± 5.3%	–	–	–	–	–	–	6%	–	–	–	–	–		75%	–	–	16%
				–	–	–	–	–	–	–	–	–	–	–	–		74%	8%	–	18%
Ipsos/Reuters	Feb 26 – Mar 4	1,086	± 3.4%	–	1%	–	0%	1%	5%	–	3%	–	9%	–	1%		66%	–	3%	13%
Ipsos/Reuters	Feb 19–25	1,138	± 3.3%	–	0%	–	1%	1%	4%	–	4%	–	8%	–	1%		65%	–	3%	14%
Ipsos/Reuters	Feb 12–18	1,040	± 3.5%	–	0%	–	1%	1%	3%	–	4%	–	8%	–	1%		69%	–	2%	12%
Emerson College^[74]	Feb 14–16	366	± 5.1%	–	–	–	–	–	–	–	–	–	–	–	–		85%	15%	–	–
FOX News^[75]	Feb 10–12	432 (A)	±4.5%	–	–	–	–	–	–	–	–	–	–	–	–		72%	–	17%	11%
McLaughlin & Associates^[76]	Feb 6–10	413	–	–	–	–	–	–	–	–	6%	–	10%	–	–		72%	–	–	11%
Monmouth University^[77]	Jan 25–27	335	± 5.4%	–	–	21%	–	–	–	–	–	–	–	–	–		66%	–	–	9%
				–	–	–	–	–	–	–	14%	–	–	–	–		73%	–	–	11%
Zogby Analytics^[78]	Jan 18–20	307	± 5.6%	2%	–	–	–	1%	6%	–	8%	–	9%	–	–		64%	–	4%	6%
HarrisX^[79]	Jan 4–5	320	–	–	–	–	–	–	–	–	–	–	17%	–	–		70%	–	–	13%
	2019
McLaughlin & Associates^[80]	Dec 10–14	392	–	–	–	–	–	2%	–	–	5%	–	9%	–	–		72%	–	–	12%
Harvard-Harris^[81]	Nov 27–28	819	–	3%	–	5%	–	2%	2%	–	6%	–	6%	5%	1%		44%	–	2%	16%
HarrisX^[82]	Nov 16–17	320	–	–	–	17%	–	–	–	–	–	–	–	–	–		66%	–	–	17%
				–	–	–	–	9%	–	–	–	–	–	–	–		70%	–	–	21%
				–	–	–	–	–	13%	–	–	–	–	–	–		69%	–	–	18%
				–	–	–	–	–	–	–	14%	–	–	–	–		67%	–	–	19%
				–	–	–	–	–	–	–	–	–	19%	–	–		69%	–	–	12%
				–	–	–	–	–	–	–	–	–	–	20%	–		65%	–	–	15%
				–	–	–	–	–	–	–	–	–	–	–	8%		70%	–	–	21%

Before November 2018

Poll source	Date(s) administered	Sample size	Margin	Bob Corker	Tom Cotton	Ted Cruz	Jeff Flake	Nikki Haley	John Kasich	Mike Pence	Mitt Romney	Marco Rubio	Ben Sasse	Donald Trump	Other	Undecided
Harvard-Harris^[83]	Jun 24–25	430	–	15%	–	–	–	–	–	–	–	–	–		85%	–	–
GQR Research^[84]	Jan 6–11	374	–	–	–	4%	1%	4%	3%	11%	5%	5%	–		62%	0%	5%
	2018
Public Policy Polling^[85]	Dec 11–12	–	–	–	–	21%	–	–	–	–	–	–	–		64%	–	15%
–				–	–	16%	–	–	–	–	–	–		74%	–	10%
–				–	–	–	–	19%	–	–	–	–		70%	–	11%
–				–	–	–	–	–	22%	–	–	–		62%	–	15%
Public Policy Polling^[86]	Oct 27–29	–	–	–	–	27%	–	–	–	–	–	–	–		57%	–	16%
–				–	–	14%	–	–	–	–	–	–		70%	–	16%
–				–	–	–	–	24%	–	–	–	–		66%	–	11%
–				–	–	–	–	–	28%	–	–	–		53%	–	19%
Public Policy Polling^[87]	Sep 22–25	–	–	–	–	15%	–	–	–	–	–	–	–		68%	–	17%
–				–	–	–	–	18%	–	–	–	–		68%	–	13%
–				–	–	–	–	–	21%	–	–	–		59%	–	21%
Fabrizio Lee^[88]	Aug 2017	1,500	± 2.5%	–	1%	13%	–	–	10%	–	–	–	1%		54%	–	20%
Public Policy Polling^[89]	Aug 18–21	–	–	–	–	22%	–	–	–	–	–	–	–		62%	–	17%
–				–	–	–	–	21%	–	–	–	–		68%	–	11%
–				–	–	–	–	–	24%	–	–	–		52%	–	23%
Opinion Savvy^[90]	Aug 16–17	220	± 6.6%	–	–	8%	–	–	17%	–	–	–	–		68%	–	7%
221		± 6.6%	–	–	12%	–	–	15%		65%	–	–	–	–	–	8%
Marist College^[91]	Aug 8–12	361	± 5.2%	–	–	–	–	–	23%	–	–	–	–		64%	–	10%
–				–	–	–	–	–	33%	–	–	–		56%	–	8%

Against unnamed primary challenger

Poll source	Date(s) administered	Sample size	Margin	Donald Trump	Other	Undecided
Rasmussen Reports^[92]	May 10–11, 2020	< 1000 (LV)	–		70%	23%	7%
Morning Consult/Politico^[93]	Feb 28 - Mar 1 2020	718 (LV)	–		91%	7%	2%
Morning Consult/Politico^[94]	Jan 4–5, 2020	700 (RV)	–		87%	10%	3%
ABC News/Washington Post^[95]	Oct 27–30	388 (A)	±6%		67%	30%	3%
FOX News	Oct 27–30	388 (A)	±6%		78%	15%	7%
FOX News^[96]	Oct 6–8	367-376(LV)	±6%		77%	17%	6%
Morning Consult^[97]	Jun 29 – Jul 1	483	± 4.0%		83%	15%	3%
Morning Consult^[98]	Jun 29 – Jul 1	541	± 4.0%		83%	15%	2%
Morning Consult^[99]	Jun 21–24	698	± 4.0%		87%	12%	1%
Morning Consult^[100]	Jun 20–23	639	± 4.0%		87%	10%	3%
Morning Consult^[101]	Jun 14–16	693	± 4.0%		86%	13%	2%
Morning Consult^[102]	Jun 7–9	659	± 4.0%		84%	13%	3%
Morning Consult^[103]	May 31 – Jun 2	672	± 4.0%		83%	14%	3%
Change Research	May 18–21	1,248	± 2.8%		95%	4%	–
Morning Consult^[104]	May 10–12	695	± 4.0%		84%	15%	3%
Morning Consult^[105]	May 3–6	680	± 4.0%		85%	13%	2%
Morning Consult^[106]	Apr 28–29	692	± 4.0%		84%	13%	2%
Morning Consult^[107]	Apr 19–21	641	± 4.0%		79%	18%	4%
Morning Consult^[108]	Apr 12–14	367	–		83%	15%	2%
		358	–		82%	15%	3%
Morning Consult^[109]	Apr 1–7	11,986	± 1.0%		76%	20%	–
Morning Consult^[110]	Mar 25–31	11,549	± 1.0%		78%	20%	–
Morning Consult^[111]	Mar 18–24	12,090	± 1.0%		77%	19%	–
Morning Consult^[112]	Mar 11–17	11,542	± 1.0%		78%	20%	–
Morning Consult^[113]	Mar 4–10	13,682	± 1.0%		77%	20%	–
Morning Consult^[114]	Feb 25 – Mar 3	11,154	± 1.0%		77%	20%	–
Morning Consult^[115]	Feb 18–24	13,782	± 1.0%		77%	20%	–
Morning Consult^[116]	Feb 11–17	13,974	± 1.0%		77%	21%	–
Morning Consult^[117]	Feb 4–10	10,685	± 1.0%		77%	20%	–
	2019
Public Religion Research Institute^[118]	Sep 17 – Oct 1	927	–		66%	33%	1%
Saint Leo University^[119]	May 25–31	–	–		63%	24%	13%
USC Dornsife/LAT^[120]	Dec 15 – Jan 15	1,530	± 3.0%		75%	25%	–
Emerson College^[121]	Jan 8–11	198	–		68%	18%	14%
	2018
Public Policy Polling	Dec 11–12	–	–		70%	24%	6%
Public Religion Research Institute^[122]	Oct 18–30	846	–		59%	34%	7%
Public Policy Polling	Oct 27–29	–	–		57%	36%	8%
Public Policy Polling	Sep 22–25	–	–		61%	27%	12%
Public Policy Polling	Aug 18–21	–	–		57%	29%	13%

Statewide polling

The statewide polls are ordered by the scheduled date of the state's primary or caucus. Polls with a sample size of <100 have their 'sample size' cells marked in red to indicate a lack of reliability.

Iowa caucus

The Iowa Republican caucus took place on Monday, February 3, 2020.^[123]

Poll source	Date(s) administered	Sample size	Margin	Michael Bloomberg	John Kasich	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
Iowa caucuses (first alignment vote)	Feb 3, 2020	–	–	–	–		97.1%	1.1%	1.3%	0.5%	–
Emerson College^[124]	Oct 13–16, 2019	286	–	–	–		93%	2%	4%	1%	–
	Aug 25	Walsh announces his candidacy
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College^[125]	Mar 21–24, 2019	207	± 6.9%	8%	–		93%	–	–	–	–
–				–		90%	–	10%	–	–
Emerson College^[126]	Jan 30 – Feb 2, 2019	280	–	–	10%		90%	–	–	–	–

New Hampshire primary

The New Hampshire Republican primary took place on Tuesday, February 11, 2020.^[123]

Since July 2019

Poll source	Date(s) administered	Sample size	Margin	Rocky De La Fuente	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
New Hampshire primary (popular vote)	Feb 11, 2020	–	–	0.1%		84.4%	0.5%	9%	5.9%	–
Emerson College^[128]	Feb 8–9, 2020	500 (LV)	±4.3%	–		84%	–	16%	–	–
University of New Hampshire/CNN^[129]	Feb 6–9, 2020	212 (LV)	±6.7%	–		90%	No voters	7%	1%	1%
RKM Research and Communications Inc./Boston Herald/FPU/NBC10^[130] https://www.nbcboston.com/news/politics/buttigieg-sanders-in-statistical-dead-heat-in-nh-nbc10-boston-franklin-pierce-herald-poll-shows/2074362/	Feb 5–8, 2020	440 (LV)	±4.7%	3%		71%	6%	8%	3%	11%
University of New Hampshire/CNN^[131]	Feb 5–8, 2020	227 (LV)	±6.5%	–		91%	No voters	5%	2%	2%
	Feb 7, 2020	Walsh withdraws from the race
University of New Hampshire/CNN^[132]	Feb 4–7, 2020	203 (LV)	±6.9%	–		91%	No voters	5%	2%	3%
Marist College/NBC News^[133]	Feb 4–6, 2020	441 (LV)	±5.8%	–		88%	1%	7%	1%	2%
	Feb 3, 2020	Iowa caucuses
RKM Research and Communications Inc./Boston Herald/FPU/NBC10^[134] https://www.nbcboston.com/news/politics/nh-primary-poll-sanders-still-leads/2070807/	Jan 29-Feb 1, 2020	438 (LV)	± 4.7%	1%		72%	3%	7%	7%	10%
RKM Research & Communications Inc./Boston Herald/FPU/NBC10^[135]	Jan 23–26, 2020	407 (LV)	–	1%		72%	3%	7%	–	9%
Marist College/NBC News^[136]	Jan 20–23, 2020	450 (LV)	± 5.5%	–		87%	2%	8%	1%	2%
University of New Hampshire/CNN^[137]	Jan 16–23, 2020	394 (LV)	± 4.9%	–		90%	1%	4%	2%	3%
RKM Research and Communications Inc./Boston Herald/FPU/NBC10^[138]	Jan 8–12, 2020	402 (LV)	–	2%		79%	4%	4%	3%	3%
MassINC Polling Group/WBUR^[139]	Dec 3–8, 2019	365 (LV)	± 5.1%	–		74%	4%	9%	9%	4%
Emerson College^[140]	Nov 22–26, 2019	440 (LV)	–	–		84%	3%	13%	0%	–
University of New Hampshire/CNN^[141]	Oct 21–27, 2019	461 (LV)	± 4.6%	–		86%	1%	5%	4%	4%
RKM Research and Communications Inc./Boston Herald/FPU^[142]	Oct 9–13, 2019	405	± 4.9%	–		71%	5%	14%	3%	7%
RKM Research and Communications Inc./Franklin Pierce University/Boston Herald^[143]	Sep 4–10, 2019	414	–	–		88%	1%	3%	1%	7%
Emerson College^[144]	Sep 6–9, 2019	379	–	–		80%	7%	13%	–	–
	Aug 25, 2019	Walsh announces his candidacy
University of New Hampshire Survey Center/CNN^[145]	Jul 8–15, 2019	289 (LV)	± 5.8%	–		86%	–	7%	2%	5%
	May 16, 2019	De La Fuente announces his candidacy
Monmouth University^[146]	May 2–7, 2019	427	± 4.8%	–		72%	–	12%	1%	2%

Before May 2019

Poll source	Date(s) administered	Sample size	Margin	Tom Cotton	Ted Cruz	Jeff Flake	Larry Hogan	John Kasich	Mike Pence	Mitt Romney	Marco Rubio	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
Suffolk University^[147]	Apr 25–28, 2019	394	± 4.9%	–	–	–	0%	9%	–	–	–		70%	–	8%	–	12%
				–	–	–	–	–	–	–	–		72%	–	17%	–	10%
University of New Hampshire^[148]	Apr 10–18, 2019	208	± 6.8%	–	–	–	1%	10%	–	–	–		76%	–	5%	–	8%
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
University of New Hampshire^[149]	Feb 18–26, 2019	218	± 6.6%	–	–	–	–	17%	–	–	–		68%	–	3%	–	12%
Emerson College^[150]	Feb 21–22, 2019	328	± 5.4%	–	–	–	–	–	–	–	–		82%	–	18%	–	–
Praecones Analytica^[151]	Jan 16–21, 2019	330	–	–	–	–	–	–	–	24%	–		70%	–	–	–	6%
Suffolk University^[152]	Apr 26–30, 2018	315	± 5.5%	–	–	15%	–	–	–	–	–		72%	–	–	–	13%
				–	–	–	–	23%	–	–	–		68%	–	–	–	8%
				–	–	–	–	–	–	28%	–		63%	–	–	–	9%
				–	–	–	–	–	–	–	23%		66%	–	–	–	11%
University of New Hampshire^[153]	Apr 13–22, 2018	202	± 6.8%	–	–	–	–	19%	–	–	–		67%	–	–	0%	14%
American Research Group^[154]	Mar 21–27, 2018	420	± 5.0%	–	–	4%	–	34%	–	–	–		51%	–	–	–	11%
				–	–	33%	–	–	–	–	–		49%	–	–	–	18%
				–	–	–	–	42%	–	–	–		48%	–	–	–	9%
				5%	7%	11%	–		36%	–	–	–	–	–	–	–		41%
American Research Group	Aug 4–6, 2017	600	± 4.0%	–	–	–	–		52%	–	–	–	40%	–	–	–	8%
				–	–	–	–		52%	27%	–	–	–	–	–	–	32%

Against unnamed primary challenger

Poll source	Date(s) administered	Sample size	Margin	Donald Trump	Other	Undecided
University of New Hampshire	Apr 10–18, 2019	208	± 6.8%		63%	14%	23%
University of New Hampshire	Feb 18–26, 2019	218	± 6.6%		56%	15%	29%
University of New Hampshire^[155]	Aug 2–19, 2018	199	± 6.9%		56%	20%	24%
University of New Hampshire	Apr 13–22, 2018	202	± 6.8%		55%	19%	27%
University of New Hampshire^[156]	Jan 28 – Feb 10, 2018	157	± 7.8%		60%	18%	23%
University of New Hampshire^[157]	Oct 3–15, 2017	191	± 7.1%		47%	23%	30%

Nevada caucus

The Nevada caucus was cancelled by the Nevada Republican Party in a vote on September 7, 2019.^[158]

Poll source	Date(s) administered	Sample size	Margin	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Undecided
	Feb 7, 2020	Walsh withdraws from the race
	Nov 12, 2019	Sanford withdraws from the race
Emerson College^[159]	Oct 31–Nov 3, 2019	409 (LV)	–	2%		92%	3%	3%	–
	Sep 8, 2019	Sanford announces his candidacy
	Sep 7, 2019	The Nevada Republican Party votes to cancel their caucus.
	Aug 25, 2019	Walsh announces his candidacy
	Apr 15, 2019	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College^[160]	Mar 28–30, 2019	263	± 6.1%	–		92%	–	8%	–

South Carolina primary

The South Carolina primary was cancelled in a vote by the South Carolina Republican Party on September 7, 2019.

Poll source	Date(s) administered	Sample size	Margin	Bob Corker	Jeff Flake	Nikki Haley	John Kasich	MarkSanford	Donald Trump	Bill Weld	Undecided
	Nov 12	Sanford withdraws from the race
	Sep 8	Sanford announces his candidacy
	Sep 7	The South Carolina Republican Party votes to cancel their primary.
Change Research^[161] https://www.postandcourier.com/politics/what-sc-voters-say-about-haley-s-possible-presidential-run/article_ba9c156e-c506-11e9-b964-dfdad0e70cbc.html	Aug 9–12, 2019	568 (LV)	± 4.3%	–	–	14%	–	–		79%	–	–
				–	–	–	–	2%		95%	–	–
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College^[162]	Feb 28 – Mar 2, 2019	380	± 5.1%	–	–	–	–			90%	10%	–
Change Research^[163]	Feb 15–18, 2019	720	–	2%	–	–	–			91%	–	8%
				–	2%	–	–			93%	–	5%
				–	–	21%	–			67%	–	11%
				–	–	–	3%			91%	–	6%
				–	–	–	–			90%	3%	7%

Against unnamed primary challenger

California primary

The California Republican primary took place on Tuesday, March 3, 2020.^[123]

Since June 2019

Poll source	Date(s) administered	Sample size	Margin	Mark Sanford	Donald Trump	Bill Weld	Joe Walsh	Other	Undecided
	Feb 7, 2020	Walsh withdraws from the race
CNN/SSRS^[165]	Dec 4–8, 2019	298 (LV)	± 6.7%	–		85%	3%	3%	2%	8%
	Nov 12, 2019	Sanford withdraws from the race
Emerson College^[166]	Sep 13–18, 2019	208 (LV)	–	6%		86%	4%	–	4%	-|- style="background:lightyellow;"| style="border-right-style:hidden;" || style="border-right-style:hidden;" | Sep 8, 2019| colspan="20" | Sanford announces his candidacy|- style="background:lightyellow;"| style="border-right-style:hidden;" || style="border-right-style:hidden;" | Aug 25, 2019| colspan="20" | Walsh announces his candidacy|} April 2019 to May 2019 Poll source Date(s) administered Sample size Margin Nikki Haley John Kasich Donald Trump Bill Weld Undecided Change Research^[167] May 25–28, 2019 989 ± 3.1% 5% – 86% – 8% – 3% 90% – 7% – – 91% 3% 6% Apr 15, 2019 Weld announces his candidacy (exploratory committee on Feb 15, 2019) Change Research^[168] Apr 6–9, 2019 853 – 5% – 83% – 12% – 4% 83% – 14% Against unnamed primary challenger Poll source Date(s) administered Sample size Margin Donald Trump Other Undecided Change Research May 25–28, 2019 989 ± 3.1% 94% 7% – Change Research Apr 6–9, 2019 853 – 88% 12% – Colorado primary The Colorado Republican primary took place on Tuesday, March 3, 2020. Poll source Date(s) administered Sample size Margin Donald Trump Bill Weld Undecided Emerson College^[169] Aug 16–19, 2019 339 ± 5.3% 86% 14% – Apr 15 Weld announces his candidacy (exploratory committee on Feb 15, 2019) Against unnamed primary challenger Massachusetts primary The Massachusetts Republican primary took place on Tuesday, March 3, 2020. Poll source Date(s) administered Sample size Margin Charlie Baker Jeff Flake John Kasich Mike Pence Mitt Romney Paul Ryan Donald Trump Bill Weld Other Undecided MassINC Polling Group/WBUR^[171] Feb 23 - 26, 2020 374 (LV) ± 5.1% – – – – – – 83% 14% 2% 2% Apr 15 Weld announces his candidacy (exploratory committee on Feb 15, 2019) Emerson College^[172] Apr 4–7, 2019 183 ± 7.2% – – – – – – 82% 18% – – YouGov/UMass Amherst^[173] Nov 7–14, 2018 227 – 30% 1% 3% – 7% 2% 40% – – 16% 225 – 33% 1% 7% 26% 8% 2% – – – 22% North Carolina primary The North Carolina Republican primary took place on Tuesday, March 3, 2020. Poll source Date(s) administered Sample size Margin Donald Trump Joe Walsh Bill Weld Other Undecided High Point University^[174] Feb 21 – 28, 2020 246 (LV) – 91% 4% 3% – 2% Marist College^[175] Feb 23 – 27, 2020 410 (LV) ± 5.4% 93% – 6% <1% 1% Meredith College^[176] Feb 16 – 24, 2020 353 (LV) – 85% 3.1% 2% 0.9% 9.1% SurveyUSA^[177] Feb 13 – 16, 2020 501 (LV) ± 3% 91% – 5% – 5% Feb 7, 2020 Walsh withdraws from the race High Point University^[178] Jan 31 – Feb 6, 2020 198 (LV) – 91% 4% 1% – 4% Aug 25, 2019 Walsh announces his candidacy Emerson College^[179] May 31 – Jun 3, 2019 336 – 88% – 12% – – Texas primary The Texas Republican primary took place on Tuesday, March 3, 2020. Poll source Date(s) administered Sample size Margin Mark Sanford Donald Trump Joe Walsh Bill Weld Other Undecided Marist College^[181] Feb 21 - 27, 2020 621 (LV) ±5.1% – 94% – 4% <1% 2% University of Texas at Tyler/DMN^[182] Feb 17 - 26, 2020 567 (LV) ± 4.12% – 86% – 6% – 8% Feb 7, 2020 Walsh withdraws from the race University of Texas at St Tyler/Dallas News^[183] Jan 21–30, 2020 445 (LV) ± 4.65% – 88% 4% 2% – 6% CNN/SSRS^[184] Dec 4–8, 2019 537 (LV) ± 5% – 86% 4% 3% 2% 4% University of Texas at Tyler^[185] Nov 5–14, 2019 597 (RV) - 4% 78% 1% 1% – – Nov 12, 2019 Sanford withdraws from the race Sep 8, 2019 Sanford announces his candidacy Aug 25, 2019 Walsh announces his candidacy Emerson College^[186] Aug 1–3, 2019 482 – – 90% – 10% – – Emerson College^[187] Apr 25–28, 2019 344 ± 5.3% – 87% – 13% – – Utah primary The Utah Republican primary took place in Tuesday, March 3, 2020. Against unnamed primary challenger Poll source Date(s) administered Sample size Margin Donald Trump Other Undecided Dan Jones & Associates/Salt Lake Chamber of Commerce^[188] October 3–10, 2019 600 (LV) ± 4% 75% 22% – Dan Jones & Associates/Salt Lake Chamber of Commerce^[189] June 11 – July 1, 2019 801 (LV) – 70% 28% – Vermont primary The Vermont Republican primary took place on Tuesday, March 3, 2020. Wyoming caucuses The last presidential cycle's Wyoming caucuses took place on March 1 in 2016 and would, if scheduled for Super Tuesday in 2020, take place on March 3, 2020. Instead, the Wyoming Republican state convention was scheduled for May 9, 2020. Poll source Date(s) administered Sample size Margin Mark Sanford Donald Trump Joe Walsh Bill Weld Undecided Feb 7, 2020 Walsh withdraws from the race Nov 12, 2019 Sanford withdraws from the race Montana State University Billings^[191] Oct 7–16, 2019 67 (LV) – No voters 91% <1% <1% 8% Michigan primary The Michigan Republican primary took place on Tuesday, March 10, 2020. Poll source Date(s) administered Sample size Margin Mark Sanford Donald Trump Joe Walsh Bill Weld Undecided YouGov/University of Wisconsin-Madison^[192] Feb 11 – 20, 2020 426 (LV) – – 97% 0% 1% 2% Feb 7, 2020 Walsh withdraws from the race Nov 12, 2019 Sanford withdraws from the race Emerson College^[193] Oct 31–Nov 3, 2019 2% 92% 3% 3% -|- style="background:lightyellow;"| style="border-right-style:hidden;" || style="border-right-style:hidden;" | Sep 8, 2019| colspan="20" | Sanford announces his candidacy|- style="background:lightyellow;"| style="border-right-style:hidden;" || style="border-right-style:hidden;" | Aug 25, 2019| colspan="20" | Walsh announces his candidacy|- style="background:lightyellow;"| style="border-right-style:hidden;" || style="border-right-style:hidden;" | Apr 15, 2019| colspan="20" | Weld announces his candidacy (exploratory committee on Feb 15, 2019)|-| style="text-align:left;"|Emerson College^[194] | Mar 7–10, 2019| 306| ± 5.6%| -| | 89%| -| 11%| –|} Illinois primary The Illinois Republican primary took place on Tuesday, March 17, 2020. Ohio primary The Ohio Republican primary took place on Tuesday, March 10, 2020. Poll source Date(s) administered Sample size Margin John Kasich MarkSanford Donald Trump Joe Walsh BillWeld Undecided Feb 7, 2020 Walsh withdraws from the race Nov 12, 2019 Sanford withdraws from the race Emerson College^[196] Sep 29–Oct 2, 2019 325 (LV) -|2%| | 87%|5%|5%|-|- style="background:lightyellow;"| style="border-right-style:hidden;" || style="border-right-style:hidden;" | Sep 8, 2019| colspan="20" | Sanford announces his candidacy|- style="background:lightyellow;"| style="border-right-style:hidden;" || style="border-right-style:hidden;" | Aug 25, 2019| colspan="20" | Walsh announces his candidacy|- style="background:lightyellow;"| style="border-right-style:hidden;" || style="border-right-style:hidden;" | Apr 15, 2019| colspan="20" | Weld announces his candidacy (exploratory committee on Feb 15, 2019)|-| style="text-align:left;"|Baldwin Wallace University^[197] | Feb 28 – Mar 9, 2018| 261| ± 6.0%| 27%| -| | 62%| -| -| –|} Florida primary The Florida Republican primary took place on Tuesday, March 17, 2020. Poll source Date(s) administered Sample size Margin Larry Hogan John Kasich Mark Sanford Donald Trump Marco Rubio Joe Walsh Bill Weld Undecided FAU-BEPI^[198] https://business.fau.edu/images/business/economics/departments-economics-pages/business-economics-polling-initiative/bepi-polls/files/2020-03-09_Biden%20Opens%20Big%20Lead%20in%20Florida%20BEPI%20MARCH%202020.pdf Mar 5 – 7, 2020 409 (LV) ± 4.8% – – – 92.6% – – 3.8% 3.5% Feb 7, 2020 Walsh withdraws from the race Florida Atlantic University^[199] Jan 9 – 12, 2020 488 (LV) ± 4.4% – – – 80% – 14% 5% – Nov 12, 2019 Sanford withdraws from the race Florida Atlantic University^[200] Sep 12–15, 2019 355 ± 5.2% – – 8% 85% – 5% 2% – Sep 8, 2019 Sanford announces his candidacy Aug 25, 2019 Walsh announces his candidacy Florida Atlantic University^[201] May 16–19, 2019 394 ± 4.9% 0% 2% – 85% 5% – 1% 7% Apr 15, 2019 Weld announces his candidacy (exploratory committee on Feb 15, 2019) Against unnamed primary challenger Wisconsin primary The Wisconsin Republican primary took place on Tuesday, April 7, 2020. Poll source Date(s) administered Sample size Margin Donald Trump Bill Weld Other Undecided YouGov/University of Wisconsin-Madison Feb 11 – 20, 2020 348 (LV) – 93% 0% 0% 7% Apr 15 Weld announces his candidacy (exploratory committee on Feb 15, 2019) Emerson College^[202] Mar 15–17, 2019 293 – 89% 11% – – Arizona primary The Arizona 2016 Republican primary was held on March 22, 2016, but the 2020 primary was cancelled on September 9, 2019.^[203] Poll source Date(s) administered Sample size Margin Mark Sanford Donald Trump Joe Walsh Bill Weld Other Undecided Feb 7, 2020 Walsh withdraws from the race Nov 12, 2019 Sanford withdraws from the race Emerson College^[204] Oct 25–28, 2019 367 (LV) – 5% 88% 3% 4% – – Sep 9, 2019 The Arizona Republican Party votes to cancel their primary. Delaware primary The Delaware Republican primary took place on Tuesday, April 28, 2020. Maryland primary The Maryland Republican primary took place on Tuesday, April 28, 2020. Pennsylvania primary The Pennsylvania Republican primary took place on Tuesday, April 28, 2020. Poll source Date(s) administered Sample size Margin Donald Trump Joe Walsh Bill Weld Undecided Mar 18, 2020 Weld withdraws from the race YouGov/University of Wisconsin-Madison Feb 11 – 20, 2020 462 (LV) – 87% 2% 2% 8% Feb 7, 2020 Walsh withdraws from the race Aug 25, 2019 Walsh announces his candidacy Apr 15 Weld announces his candidacy (exploratory committee on Feb 15, 2019) Emerson College^[207] Mar 26–28, 2019 311 ± 5.5% 90% – 10% – Montana primary Poll source Date(s) administered Sample size Margin Mark Sanford Donald Trump Joe Walsh Bill Weld Undecided Feb 7, 2020 Walsh withdraws from the race Nov 12, 2019 Sanford withdraws from the race Montana State University Billings^[208] Oct 7–16, 2019 99 (LV) – 1% 88% No voters No voters 11% New Jersey primary Poll source Date(s) administered Sample size Margin Donald Trump Joe Walsh Bill Weld Undecided Feb 7, 2020 Walsh withdraws from the race Emerson College^[209] Jan 16–19, 2020 197 (LV) ± 6.9% 93% 4% 4% – New Mexico primary Poll source Date(s) administered Sample size Margin Donald Trump Joe Walsh Bill Weld Undecided Feb 7, 2020 Walsh withdraws from the race Emerson College^[210] Jan 3–6, 2020 322 (LV) – 87% 8% 5% – See also 2020 Republican National Convention Nationwide opinion polling for the 2020 Democratic Party presidential primaries Statewide opinion polling for the 2020 Democratic Party presidential primaries Nationwide opinion polling for the 2020 United States presidential election Statewide opinion polling for the 2020 United States presidential election External links Primary poll tracker from FiveThirtyEight ]

Notes and References

1. https://www.270towin.com/2020-republican-nomination/ 270 to Win
2. https://www.realclearpolitics.com/epolls/2020/president/us/2020_republican_presidential_nomination-6257.html RealClearPolitics
3. Web site: Emerson College . 2020-04-10 . 2020-04-10 . https://web.archive.org/web/20200410181720/http://emersonpolling.com/2020/03/19/march-national-poll-70-of-americans-worried-about-catching-coronavirus/ . dead .
4. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/3rdraw493c/econTabReport.pdf YouGov/Economist
5. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/zye3phsf7t/econTabReport.pdf YouGov/Economist
6. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/m3wzkd0n59/econTabReport.pdf YouGov/Economist
7. http://emersonpolling.com/2020/02/19/february-national-poll-sanders-takes-the-lead-for-democratic-nomination-bloomberg-on-the-rise/ Emerson College
8. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/we97h9ywxh/20200213_yahoo_primary_crosstabs.pdf YouGov/Yahoo News
9. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/79zfxkws33/econTabReport.pdf YouGov/Economist
10. https://mclaughlinonline.com/pols/wp-content/uploads/2020/02/National-Monthly-Omnibus-FEBRUARY-PUBLIC.pdf McLaughlin & Associates
11. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/73jqd6u5mv/econTabReport.pdf YouGov/Economist
12. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/3ormein07a/econTabReport.pdf YouGov/Economist
13. http://emersonpolling.com/2020/01/24/national-2020-biden-and-sanders-battle-in-two-way-race-for-democratic-nomination/ Emerson College
14. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/alq58zq5zt/econTabReport.pdf YouGov/Economist
15. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/ueji3eha6i/econTabReport.pdf YouGov/Economist
16. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/6s5t9qkjll/econTabReport.pdf YouGov/The Economist
17. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/2r6hyqtv9p/econTabReport.pdf YouGov/The Economist
18. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/t4lyjjoemc/econTabReport.pdf YouGov/Economist
19. https://mclaughlinonline.com/pols/wp-content/uploads/2019/12/National-Monthly-December-PUBLIC.pdf McLaughlin & Associates
20. http://emersonpolling.com/2019/12/18/december-national-poll-biden-and-sanders-pull-away-from-the-pack-as-warren-falls/ Emerson College
21. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/ua3ar45wbg/econTabReport.pdf YouGov/Economist
22. https://www.suffolk.edu/-/media/suffolk/documents/academics/research-at-suffolk/suprc/polls/national/2019/12_17_2019_marginals_pdftxt.pdf Suffolk University
23. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/4yqcix83qw/econTabReport.pdf YouGov/Economist
24. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/799kgtotz3/econTabReport.pdf YouGov/Economist
25. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/a10nw9wbas/econTabReport.pdf YouGov/Economist
26. https://www.realclearpolitics.com/docs/EWTN_Topline.pdf RealClear Opinion Research
27. http://emersonpolling.com/2019/11/21/november-national-poll-support-for-impeachment-declines-biden-and-sanders-lead-democratic-primary/ Emerson College
28. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/u9tu99dui5/econTabReport.pdf YouGov/Economist
29. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/7umtlf80ov/econTabReport.pdf YouGov/Economist
30. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/cseozthmrp/econTabReport.pdf YouGov/Economist
31. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/zgaz948hzw/econTabReport.pdf YouGov/Economist
32. https://www.suffolk.edu/-/media/suffolk/documents/academics/research-at-suffolk/suprc/polls/national/2019/10_30_2019_marginals_pdftxt.pdf Suffolk University/USA Today
33. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/s96v7z4zoa/econTabReport.pdf YouGov/Economist
34. https://mclaughlinonline.com/pols/wp-content/uploads/2019/10/National-Monthly-Omnibus-October-PUBLIC-1.pdf McLaughlin and Associates
35. https://emersonpolling.reportablenews.com/pr/october-national-poll-biden-sanders-warren-maintain-front-runner-status-in-democratic-primary Emerson College
36. https://www.ipsos.com/sites/default/files/ct/news/documents/2019-10/topline_reuters_democratic_debate_poll_10_21_2019_wu.pdf Ipsos
37. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/kvoamfqbbo/econTabReport.pdf YouGov/Economist
38. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/x3neaunoh2/econTabReport.pdf YouGov/Economist
39. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/eb2rrb9ofh/econTabReport.pdf YouGov/Economist
40. https://poll.qu.edu/images/polling/us/us09252019_umpj13.pdf/ Quinnipiac University
41. http://emersonpolling.com/2019/09/24/warren-surges-biden-slips-and-sanders-steadies-three-way-dead-heat-for-the-nomination/ Emerson College
42. https://www.scribd.com/document/426593447/Fox-News-Poll-results-September-15-17-2019 Fox News
43. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/m1n9ik6irs/econTabReport.pdf YouGov/Economist
44. https://emersonpolling.reportablenews.com/pr/california-2020-biden-sanders-warren-in-statistical-tie-in-democratic-primary-harris-struggles-in-home-state Emerson College
45. https://www.prri.org/wp-content/uploads/2019/10/2019-AVS-Topline-Oct-21-Release-v1-PDF.pdf Public Religion Research Institute
46. Web site: HarrisX . 2019-09-16 . 2019-09-14 . https://web.archive.org/web/20190914144537/https://scottrasmussen.com/crosstabs-sep-9-12-19/ . dead .
47. https://democracycorps.com/wp-content/uploads/2019/09/DCorps_Full-Internal-National-Phone-FQ_091119.pdf Democracy Corps
48. https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/hrk03f83zc/econTabReport.pdf YouGov/Economist
49. https://mclaughlinonline.com/pols/wp-content/uploads/2019/09/National-Monthly-Omnibus-September-Public.pdf McLaughlin & Associates
50. http://emersonpolling.com/2019/08/27/august-national-poll-sanders-closing-gap-with-biden-mayor-pete-fades/ Emerson College
51. Web site: HarrisX . 2019-08-28 . 2019-08-28 . https://web.archive.org/web/20190828213941/https://scottrasmussen.com/crosstabs-aug-23-26-19-4/ . dead .
52. https://www.suffolk.edu/-/media/suffolk/documents/academics/research-at-suffolk/suprc/polls/national/2019/8_28_2019_marginals_pdftxt.pdf Suffolk University
53. https://mclaughlinonline.com/pols/wp-content/uploads/2019/07/National-Monthly-Omnibus-July-Release-1.pdf McLaughlin & Associates
54. https://democracycorps.com/wp-content/uploads/2019/08/Dcorps_July-National-Poll-072819-FQ-1.pdf Democracy Corps
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