IA - 2016 GOP Presidential Primary: Donald Trump 37% - Ted Cruz 26% - Marco Rubio 14% - (CNN/ORC 01/21/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +11

IA - 2016 GOP Presidential Primary: Donald Trump 26% - Ted Cruz 25% - Marco Rubio 13% - (Loras College 01/21/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +1

IA - 2016 Democratic Presidential Primary: Hillary Clinton 48% - Bernie Sanders 39% - Martin O'Malley 7% - (Monmouth College/KBUR/Douglas Fulmer 01/21/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +9

IA - 2016 GOP Presidential Primary: Ted Cruz 27% - Donald Trump 25% - Marco Rubio 9% - (Monmouth College/KBUR/Douglas Fulmer 01/21/2016) chart & more info

Donald Trump
Ted Cruz
  • Cruz +2

IA - 2016 Democratic Presidential Primary: Hillary Clinton 42% - Bernie Sanders 40% - Martin O'Malley 4% - (Des Moines Register/Bloomberg 01/14/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +2

IA - 2016 GOP Presidential Primary: Ted Cruz 25% - Donald Trump 22% - Marco Rubio 12% - (Des Moines Register/Bloomberg 01/13/2016) chart & more info

Donald Trump
Ted Cruz
  • Cruz +3

IA - 2016 GOP Presidential Primary: Ted Cruz 31% - Donald Trump 24% - Marco Rubio 12% - (Mason-Dixon 01/12/2016) chart & more info

Donald Trump
Ted Cruz
  • Cruz +7

IA - 2016 GOP Presidential Primary: Donald Trump 28% - Ted Cruz 26% - Marco Rubio 13% - (PPP 01/12/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +2

IA - 2016 Democratic Presidential Primary: Hillary Clinton 46% - Bernie Sanders 40% - Martin O'Malley 8% - (PPP 01/12/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +6

IA - 2016 Democratic Presidential Primary: Bernie Sanders 49% - Hillary Clinton 44% - Martin O'Malley 4% - (Quinnipiac 01/12/2016) chart & more info

Hillary Clinton
Bernie Sanders
  • Sanders +5

IA - 2016 GOP Presidential Primary: Donald Trump 29% - Ted Cruz 25% - Marco Rubio 10% - (ARG 01/11/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +4

IA - 2016 Democratic Presidential Primary: Bernie Sanders 47% - Hillary Clinton 44% - Martin O'Malley 3% - (ARG 01/11/2016) chart & more info

Hillary Clinton
Bernie Sanders
  • Sanders +3

IA - 2016 GOP Presidential Primary: Donald Trump 31% - Ted Cruz 29% - Marco Rubio 15% - (Quinnipiac 01/11/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +2

IA - Trump vs. Clinton: Hillary Clinton 48% - Donald Trump 40% - (NBC/WSJ/Marist 01/10/2016) chart & more info

Donald Trump
Hillary Clinton
  • Clinton +8

IA - 2016 Democratic Presidential Primary: Hillary Clinton 49% - Bernie Sanders 42% - Martin O'Malley 5% - (Mason-Dixon 01/10/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +7

...
7
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