IA - Trump vs. Clinton: Hillary Clinton 42% - Donald Trump 39% - (NBC/WSJ/Marist 07/13/2016) chart & more info

Donald Trump
Hillary Clinton
  • Clinton +3

IA - Trump vs. Clinton: Donald Trump 44% - Hillary Clinton 42% - (Monmouth Univ. 07/12/2016) chart & more info

Hillary Clinton
Donald Trump
  • Trump +2

IA - Trump vs. Clinton: Hillary Clinton 48% - Donald Trump 34% - (Loras College 06/30/2016) chart & more info

Donald Trump
Hillary Clinton
  • Clinton +14

IA - Trump vs. Clinton: Hillary Clinton 41% - Donald Trump 39% - (PPP 06/28/2016) chart & more info

Donald Trump
Hillary Clinton
  • Clinton +2

IA - 2016 Senate: Patty Judge 42% - Rob Hogg 25% - Bob Krause 6% - (Des Moines Register/Mediacom 06/05/2016) chart & more info

Rob Hogg
Patty Judge
  • Judge +17

IA - 2016 Democratic Presidential Primary: Bernie Sanders 49% - Hillary Clinton 46% - Martin O'Malley 3% - (Quinnipiac 02/01/2016) chart & more info

Hillary Clinton
Bernie Sanders
  • Sanders +3

IA - 2016 GOP Presidential Primary: Donald Trump 31% - Ted Cruz 24% - Marco Rubio 17% - (Quinnipiac 02/01/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +7

IA - 2016 GOP Presidential Primary: Donald Trump 20% - Ted Cruz 19% - Marco Rubio 19% - (Opinion Savvy 02/01/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +1

IA - 2016 Democratic Presidential Primary: Hillary Clinton 51% - Bernie Sanders 43% - Martin O'Malley 4% - (Emerson College 02/01/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +8

IA - 2016 GOP Presidential Primary: Donald Trump 27% - Ted Cruz 26% - Marco Rubio 22% - (Emerson College 02/01/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +1

IA - 2016 Democratic Presidential Primary: Hillary Clinton 45% - Bernie Sanders 42% - Martin O'Malley 3% - (Des Moines Register/Bloomberg 01/30/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +3

IA - 2016 GOP Presidential Primary: Donald Trump 28% - Ted Cruz 23% - Marco Rubio 15% - (Des Moines Register/Bloomberg 01/30/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +5

IA - 2016 Democratic Presidential Primary: Hillary Clinton 48% - Bernie Sanders 40% - Martin O'Malley 7% - (PPP 01/29/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +8

IA - 2016 GOP Presidential Primary: Donald Trump 31% - Ted Cruz 23% - Marco Rubio 14% - (PPP 01/28/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +8

IA - 2016 Democratic Presidential Primary: Hillary Clinton 47% - Bernie Sanders 42% - Martin O'Malley 6% - (Monmouth Univ. 01/28/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +5