Compare two pollsters

The most direct test of whether two pollsters really differ: take polls of the same race fieldedwithin a week of each other and average the gap. This uses no model and no weighting.

Most-compared pairs: election polls

Pollster APollster BMatched pollsRacesA − B gap95% interval
Morning ConsultYouGov841R+1.1-1.6 to -0.6
IpsosYouGov411R+1.2-1.9 to -0.5
Echelon InsightsYouGov362D+0.4-0.4 to 1.1
VerasightYouGov351D+3.02.1 to 3.7
IpsosMorning Consult331R+0.7-1.4 to 0.0
CygnalYouGov313R+0.5-1.3 to 0.2
Quantus InsightsYouGov317R+1.1-2.4 to 0.0
Big Data PollYouGov298D+1.0-0.3 to 2.5
Morning ConsultVerasight291R+4.1-4.9 to -3.2
Emerson CollegeYouGov284D+0.6-1.1 to 2.3
Morning ConsultQuantus Insights241R+1.3-2.1 to -0.3
RMG ResearchYouGov221R+3.1-4.8 to -1.4
CygnalMorning Consult221D+1.60.8 to 2.4
McLaughlin & AssociatesYouGov211R+2.7-4.0 to -1.4
Echelon InsightsMorning Consult211D+1.30.6 to 2.0
Big Data PollMorning Consult212D+3.42.2 to 4.6
Clarity Campaign LabsYouGov192D+0.7-0.6 to 1.9
Emerson CollegeMorning Consult191D+3.11.5 to 4.6
IpsosVerasight191R+4.7-6.0 to -3.6
Echelon InsightsVerasight181R+2.8-3.9 to -1.9
Quantus InsightsVerasight181R+2.9-4.0 to -1.9
Echelon InsightsIpsos161D+2.31.6 to 3.1
NBC News (Hart Research/Public Opinion Strategies)YouGov161D+0.6-0.6 to 1.8
McLaughlin & AssociatesMorning Consult161R+1.5-2.4 to -0.6
CygnalQuantus Insights151D+0.2-0.8 to 1.2
CNN/SSRSYouGov155D+0.7-0.3 to 1.6
Morning ConsultRMG Research151D+1.3-0.7 to 3.2
Echelon InsightsQuantus Insights142D+0.3-0.6 to 1.3
Big Data PollQuantus Insights144D+2.20.6 to 4.0
Echelon InsightsMcLaughlin & Associates141D+3.52.5 to 4.4
The Winston GroupYouGov131D+0.9-0.3 to 2.3
FocaldataYouGov131D+1.80.7 to 2.7
HarrisXMorning Consult131R+1.5-2.4 to -0.5
Marist PollYouGov127D+5.43.9 to 7.0
Marquette Law School PollYouGov121D+2.30.3 to 4.1
CygnalRMG Research121D+3.91.9 to 5.9
Emerson CollegeQuantus Insights124D+1.40.1 to 2.8
Emerson CollegeVerasight121R+0.6-2.3 to 1.2
The New York Times/SienaYouGov127D+0.7-0.8 to 2.5
McLaughlin & AssociatesVerasight121R+7.3-9.2 to -5.2

Most-compared pairs: Trump approval

Pollster APollster BMatched pollsRacesA − B gap95% interval
Morning ConsultYouGov1931+5.0 net approval4.6 to 5.5
IpsosYouGov991−4.7 net approval-5.3 to -3.9
RMG ResearchYouGov961+9.0 net approval8.1 to 10.0
IpsosMorning Consult901−9.3 net approval-10.1 to -8.5
Morning ConsultRMG Research851−4.6 net approval-5.6 to -3.6
Quantus InsightsYouGov691+6.0 net approval5.3 to 6.7
Global Strategy GroupYouGov611−1.2 net approval-1.9 to -0.5
Morning ConsultQuantus Insights591−1.4 net approval-2.2 to -0.4
Global Strategy GroupMorning Consult581−6.2 net approval-7.0 to -5.3
Echelon InsightsYouGov551+1.8 net approval0.9 to 2.6
J.L. PartnersYouGov511+6.8 net approval5.3 to 8.3
Echelon InsightsMorning Consult491−3.3 net approval-4.5 to -2.2
TIPP InsightsYouGov481+3.6 net approval2.5 to 4.8
IpsosRMG Research481−14.0 net approval-15.1 to -12.8
Morning ConsultQuinnipiac University471+9.0 net approval8.2 to 10.0
VerasightYouGov461−3.3 net approval-4.3 to -2.4
J.L. PartnersMorning Consult441+2.5 net approval1.0 to 4.1
Quinnipiac UniversityYouGov441−3.8 net approval-4.9 to -2.7
Emerson CollegeYouGov441+5.4 net approval4.4 to 6.5
AP-NORCYouGov431−9.2 net approval-10.7 to -7.6
Morning ConsultTIPP Insights421+1.4 net approval0.1 to 2.6
AP-NORCMorning Consult411−14.0 net approval-15.6 to -12.5
Morning ConsultVerasight401+9.6 net approval8.6 to 10.7
Emerson CollegeMorning Consult381−0.3 net approval-1.6 to 1.1
American Research GroupYouGov381−11.0 net approval-12.4 to -9.7
IpsosQuantus Insights371−10.2 net approval-11.2 to -9.2
HarrisXYouGov361+8.6 net approval7.5 to 9.8
Fox News (Beacon Research/Shaw & Co.)YouGov361Even-1.1 to 1.1
American Research GroupMorning Consult351−16.7 net approval-18.7 to -14.3
ActiVoteYouGov351+2.4 net approval1.4 to 3.3
HarrisXMorning Consult351+3.1 net approval1.9 to 4.3
Quantus InsightsRMG Research341−3.0 net approval-4.3 to -1.7
ActiVoteMorning Consult341−2.0 net approval-3.0 to -1.0
Fox News (Beacon Research/Shaw & Co.)Morning Consult341−5.5 net approval-6.8 to -4.3
Echelon InsightsIpsos331+6.3 net approval5.2 to 7.4
Global Strategy GroupIpsos331+2.9 net approval2.0 to 3.9
Big Data PollYouGov311+7.7 net approval6.5 to 8.9
Global Strategy GroupRMG Research301−10.7 net approval-12.3 to -9.0
John Zogby StrategiesYouGov291+4.8 net approval3.4 to 6.1
The Bullfinch GroupYouGov281+1.6 net approval0.2 to 3.0