IA - 2016 Democratic Presidential Primary: Hillary Clinton 54% - Bernie Sanders 20% - Joe Biden 11% - (Suffolk Univ. 08/25/2015) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +34

IA - 2016 Democratic Presidential Primary: Hillary Clinton 50% - Bernie Sanders 31% - Joe Biden 12% - (CNN/ORC 08/12/2015) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +19

IA - 2016 GOP Presidential Primary: Donald Trump 22% - Ben Carson 14% - Scott Walker 9% - (CNN/ORC 08/12/2015) chart & more info

Ben Carson
Donald Trump
  • Trump +8

IA - 2016 Presidential Election: Scott Walker 44% - Hillary Clinton 43% - (PPP 08/11/2015) chart & more info

Hillary Clinton
Scott Walker
  • Walker +1

IA - 2016 Presidential Election: Marco Rubio 43% - Hillary Clinton 42% - (PPP 08/11/2015) chart & more info

Hillary Clinton
Marco Rubio
  • Rubio +1

IA - 2016 Presidential Election: Hillary Clinton 41% - John Kasich 39% - (PPP 08/11/2015) chart & more info

John Kasich
Hillary Clinton
  • Clinton +2

IA - 2016 Presidential Election: Hillary Clinton 43% - Rand Paul 40% - (PPP 08/11/2015) chart & more info

Rand Paul
Hillary Clinton
  • Clinton +3

IA - 2016 Presidential Election: Hillary Clinton 44% - Ted Cruz 42% - (PPP 08/11/2015) chart & more info

Ted Cruz
Hillary Clinton
  • Clinton +2

IA - 2016 Presidential Election: Hillary Clinton 41% - Chris Christie 39% - (PPP 08/11/2015) chart & more info

Chris Christie
Hillary Clinton
  • Clinton +2

IA - 2016 Presidential Election: Hillary Clinton 44% - Jeb Bush 40% - (PPP 08/11/2015) chart & more info

Jeb Bush
Hillary Clinton
  • Clinton +4

IA - 2016 Presidential Election: Hillary Clinton 43% - Donald Trump 40% - (PPP 08/11/2015) chart & more info

Donald Trump
Hillary Clinton
  • Clinton +3

IA - 2016 Presidential Election: Ben Carson 44% - Hillary Clinton 40% - (PPP 08/11/2015) chart & more info

Hillary Clinton
Ben Carson
  • Carson +4

IA - 2016 GOP Presidential Primary: Donald Trump 17% - Scott Walker 12% - Marco Rubio 10% - (Suffolk Univ/USA Today 08/11/2015) chart & more info

Scott Walker
Donald Trump
  • Trump +5

IA - 2016 Democratic Presidential Primary: Hillary Clinton 52% - Bernie Sanders 25% - Martin O'Malley 7% - (PPP 08/10/2015) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +27

IA - 2016 GOP Presidential Primary: Donald Trump 19% - Scott Walker 12% - Ben Carson 12% - (PPP 08/10/2015) chart & more info

Scott Walker
Donald Trump
  • Trump +7

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