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 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 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 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 GOP Presidential Primary: Donald Trump 32% - Ted Cruz 25% - Marco Rubio 18% - (NBC/WSJ/Marist 01/28/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +7

IA - 2016 GOP Presidential Primary: Donald Trump 30% - Ted Cruz 23% - Marco Rubio 16% - (Monmouth Univ. 01/27/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +7

IA - 2016 GOP Presidential Primary: Ted Cruz 26% - Donald Trump 19% - Marco Rubio 12% - (Iowa State Univ./WHO-HD 01/26/2016) chart & more info

Donald Trump
Ted Cruz
  • Cruz +7

IA - 2016 GOP Presidential Primary: Donald Trump 31% - Ted Cruz 29% - Marco Rubio 13% - (Quinnipiac 01/26/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +2

IA - 2016 GOP Presidential Primary: Donald Trump 33% - Ted Cruz 26% - Marco Rubio 11% - (ARG 01/25/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +7

IA - 2016 GOP Presidential Primary: Donald Trump 34% - Ted Cruz 23% - Marco Rubio 12% - (FOX News 01/24/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +11

IA - 2016 GOP Presidential Primary: Donald Trump 33% - Ted Cruz 23% - Marco Rubio 14% - (Emerson College 01/22/2016) chart & more info

Ted Cruz
Donald Trump
  • Trump +10

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 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