IA - 2016 Democratic Presidential Primary: Hillary Clinton 52% - Bernie Sanders 33% - Martin O'Malley 3% - (Quinnipiac 07/02/2015) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +19

IA - 2016 GOP Presidential Primary: Scott Walker 18% - Donald Trump 10% - Rand Paul 9% - (Quinnipiac 07/01/2015) chart & more info

Donald Trump
Scott Walker
  • Walker +8

IA - 2016 Democratic Presidential Primary: Hillary Clinton 50% - Bernie Sanders 24% - Martin O'Malley 2% - (Bloomberg 06/25/2015) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +26

IA - 2016 Democratic Presidential Primary: Hillary Clinton 54% - Bernie Sanders 12% - Joe Biden 9% - (Morning Consult 06/15/2015) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +42

IA - 2016 GOP Presidential Primary: Scott Walker 18% - Mike Huckabee 10% - Rand Paul 10% - (Morning Consult 06/15/2015) chart & more info

Mike Huckabee
Scott Walker
  • Walker +8

IA - 2016 GOP Presidential Primary: Scott Walker 17% - Marco Rubio 13% - Rand Paul 4% - (Gravis Marketing 06/04/2015) chart & more info

Marco Rubio
Scott Walker
  • Walker +4

IA - 2016 Presidential Election: Hillary Clinton 43% - Jeb Bush 40% - (Gravis Marketing 06/04/2015) chart & more info

Jeb Bush
Hillary Clinton
  • Clinton +3

IA - 2016 Presidential Election: Hillary Clinton 45% - Scott Walker 44% - (Gravis Marketing 06/04/2015) chart & more info

Scott Walker
Hillary Clinton
  • Clinton +1

IA - 2016 Presidential Election: Mike Huckabee 45% - Hillary Clinton 44% - (Gravis Marketing 06/04/2015) chart & more info

Hillary Clinton
Mike Huckabee
  • Huckabee +1

IA - 2016 Presidential Election: Hillary Clinton 41% - Chris Christie 37% - (Gravis Marketing 06/04/2015) chart & more info

Chris Christie
Hillary Clinton
  • Clinton +4

IA - 2016 Presidential Election: Rand Paul 44% - Hillary Clinton 43% - (Gravis Marketing 06/04/2015) chart & more info

Hillary Clinton
Rand Paul
  • Paul +1

IA - 2016 Presidential Election: Hillary Clinton 43% - Carly Fiorina 40% - (Gravis Marketing 06/04/2015) chart & more info

Carly Fiorina
Hillary Clinton
  • Clinton +3

IA - 2016 Presidential Election: Hillary Clinton 43% - Marco Rubio 43% - (Gravis Marketing 06/04/2015) chart & more info

Marco Rubio
Hillary Clinton
  • Rubio 0

IA - 2016 Presidential Election: Hillary Clinton 46% - Ted Cruz 40% - (Gravis Marketing 06/04/2015) chart & more info

Ted Cruz
Hillary Clinton
  • Clinton +6

IA - 2016 Presidential Election: Hillary Clinton 44% - Ben Carson 41% - (Gravis Marketing 06/04/2015) chart & more info

Ben Carson
Hillary Clinton
  • Clinton +3

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