MN - 2016 Presidential Election: Bernie Sanders 49% - Marco Rubio 38% - (Marquette Univ. 01/28/2016) chart & more info

Marco Rubio
Bernie Sanders
  • Sanders +11

MN - 2016 Democratic Presidential Primary: Hillary Clinton 45% - Bernie Sanders 43% - Martin O'Malley 1% - (Marquette Univ. 01/28/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +2

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

PA - 2016 Democratic Presidential Primary: Hillary Clinton 46% - Bernie Sanders 29% - Martin O'Malley 2% - (Franklin & Marshall 01/28/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +17

SC - 2016 Democratic Presidential Primary: Hillary Clinton 64% - Bernie Sanders 27% - Martin O'Malley 2% - (NBC/WSJ/Marist 01/28/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +37

NH - 2016 Democratic Presidential Primary: Bernie Sanders 57% - Hillary Clinton 38% - Martin O'Malley 2% - (NBC/WSJ/Marist 01/28/2016) chart & more info

Hillary Clinton
Bernie Sanders
  • Sanders +19

IA - 2016 Democratic Presidential Primary: Hillary Clinton 48% - Bernie Sanders 45% - Martin O'Malley 3% - (NBC/WSJ/Marist 01/28/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +3

NC - 2016 Democratic Presidential Primary: Hillary Clinton 53% - Bernie Sanders 28% - Martin O'Malley 2% - (Civitas 01/27/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +25

NH - 2016 Democratic Presidential Primary: Bernie Sanders 52% - Hillary Clinton 44% - Martin O'Malley 3% - (Emerson College 01/27/2016) chart & more info

Hillary Clinton
Bernie Sanders
  • Sanders +8

IA - 2016 Democratic Presidential Primary: Bernie Sanders 49% - Hillary Clinton 45% - Martin O'Malley 4% - (Quinnipiac 01/27/2016) chart & more info

Hillary Clinton
Bernie Sanders
  • Sanders +4

US - 2016 Democratic Presidential Primary: Hillary Clinton 55% - Bernie Sanders 36% - Martin O'Malley 4% - (ABC News/Wash Post 01/27/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +19

IA - 2016 Democratic Presidential Primary: Hillary Clinton 47% - Bernie Sanders 45% - Martin O'Malley 1% - (Iowa State Univ./WHO-HD 01/26/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +2

NH - 2016 Democratic Presidential Primary: Bernie Sanders 49% - Hillary Clinton 42% - Martin O'Malley 3% - (ARG 01/26/2016) chart & more info

Hillary Clinton
Bernie Sanders
  • Sanders +7

IA - 2016 Democratic Presidential Primary: Hillary Clinton 48% - Bernie Sanders 42% - Martin O'Malley 3% - (FOX News 01/25/2016) chart & more info

Bernie Sanders
Hillary Clinton
  • Clinton +6

NH - 2016 Democratic Presidential Primary: Bernie Sanders 55% - Hillary Clinton 39% - Martin O'Malley 2% - (Franklin Pierce Univ./Boston Herald 01/25/2016) chart & more info

Hillary Clinton
Bernie Sanders
  • Sanders +16