IA - 2016 GOP Presidential Primary: Ben Carson 32% - Donald Trump 18% - Marco Rubio 10% - (Monmouth Univ. 10/26/2015) chart & more info

Donald Trump
Ben Carson
  • Carson +14

IA - 2016 GOP Presidential Primary: Ben Carson 31% - Donald Trump 19% - Marco Rubio 10% - (Loras College 10/26/2015) chart & more info

Donald Trump
Ben Carson
  • Carson +12

MA - 2016 GOP Presidential Primary: Donald Trump 48% - Ben Carson 14% - Marco Rubio 12% - (Emerson College 10/23/2015) chart & more info

Ben Carson
Donald Trump
  • Trump +34

IA - 2016 GOP Presidential Primary: Ben Carson 28% - Donald Trump 19% - Marco Rubio 9% - (Des Moines Register/Bloomberg 10/23/2015) chart & more info

Donald Trump
Ben Carson
  • Carson +9

IA - 2016 GOP Presidential Primary: Ben Carson 28% - Donald Trump 20% - Marco Rubio 13% - (Quinnipiac 10/22/2015) chart & more info

Donald Trump
Ben Carson
  • Carson +8

WI - 2016 Presidential Election: Bernie Sanders 55% - Donald Trump 37% - (Wisconsin Public Radio 10/21/2015) chart & more info

Donald Trump
Bernie Sanders
  • Sanders +18

WI - 2016 Presidential Election: Hillary Clinton 50% - Donald Trump 39% - (Wisconsin Public Radio 10/21/2015) chart & more info

Donald Trump
Hillary Clinton
  • Clinton +11

NH - 2016 Presidential Election: Bernie Sanders 49% - Donald Trump 40% - (PPP 10/21/2015) chart & more info

Donald Trump
Bernie Sanders
  • Sanders +9

NH - 2016 Presidential Election: Hillary Clinton 47% - Donald Trump 41% - (PPP 10/21/2015) chart & more info

Donald Trump
Hillary Clinton
  • Clinton +6

NH - 2016 GOP Presidential Primary: Donald Trump 24% - Ben Carson 17% - Jeb Bush 10% - (Bloomberg/Saint Anselm/Purple Strategies 10/21/2015) chart & more info

Ben Carson
Donald Trump
  • Trump +7

US - 2016 GOP Presidential Primary: Donald Trump 32% - Ben Carson 22% - Marco Rubio 10% - (ABC News/Wash Post 10/21/2015) chart & more info

Ben Carson
Donald Trump
  • Trump +10

US - 2016 GOP Presidential Primary: Donald Trump 32% - Ben Carson 23% - Marco Rubio 14% - (Emerson College 10/20/2015) chart & more info

Ben Carson
Donald Trump
  • Trump +9

NH - 2016 GOP Presidential Primary: Donald Trump 28% - Ben Carson 11% - Carly Fiorina 7% - (PPP 10/20/2015) chart & more info

Ben Carson
Donald Trump
  • Trump +17

NH - 2016 GOP Presidential Primary: Donald Trump 28% - Ben Carson 16% - Carly Fiorina 10% - (Boston Herald/Franklin Pierce Univ. 10/20/2015) chart & more info

Ben Carson
Donald Trump
  • Trump +12

US - 2016 GOP Presidential Primary: Donald Trump 28% - Ben Carson 18% - Ted Cruz 10% - (Monmouth Univ. 10/20/2015) chart & more info

Ben Carson
Donald Trump
  • Trump +10