SC - 2016 Democratic Presidential Primary: Hillary Clinton 65% - Joe Biden 20% - Bernie Sanders 3% - (NBC/Marist 02/15/2015) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +45

IA - 2016 Democratic Presidential Primary: Hillary Clinton 68% - Joe Biden 12% - Martin O'Malley 0% - (NBC/Marist 02/15/2015) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +56

NC - 2016 Democratic Presidential Primary: Hillary Clinton 54% - Joe Biden 18% - Elizabeth Warren 12% - (PPP 02/04/2015) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +36

FL - 2016 Democratic Presidential Primary: Hillary Clinton 61% - Joe Biden 11% - Elizabeth Warren 9% - (Quinnipiac 02/04/2015) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +50

PA - 2016 Democratic Presidential Primary: Hillary Clinton 58% - Joe Biden 13% - Elizabeth Warren 11% - (PPP 01/23/2015) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +45

NJ - 2016 Democratic Presidential Primary: Hillary Clinton 65% - Joe Biden 7% - Elizabeth Warren 11% - (Quinnipiac 01/23/2015) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +58

US - 2016 Democratic Presidential Primary: Hillary Clinton 66% - Joe Biden 8% - Elizabeth Warren 9% - (CNN/Opinion Research 12/28/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +58

US - 2016 Democratic Presidential Primary: Hillary Clinton 61% - Joe Biden 14% - Elizabeth Warren 13% - (ABC News/Wash Post 12/21/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +47

US - 2016 Democratic Presidential Primary: Hillary Clinton 62% - Joe Biden 10% - Elizabeth Warren 12% - (FOX News 12/16/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +52

US - 2016 Democratic Presidential Primary: Hillary Clinton 62% - Joe Biden 11% - Elizabeth Warren 9% - (McClatchy/Marist 12/15/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +51

US - 2016 Democratic Presidential Primary: Hillary Clinton 64% - Joe Biden 13% - Elizabeth Warren 11% - (ABC News/Wash Post 10/19/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +51

US - 2016 GOP Presidential Primary: Hillary Clinton 64% - Joe Biden 15% - Elizabeth Warren 8% - (McClatchy/Marist 10/04/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +49

NH - 2016 Democratic Presidential Primary: Hillary Clinton 60% - Joe Biden 8% - Elizabeth Warren 11% - (CNN/Opinion Research 09/15/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +52

IA - 2016 Democratic Presidential Primary: Hillary Clinton 53% - Joe Biden 15% - Elizabeth Warren 7% - (CNN/Opinion Research 09/12/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +38

MA - 2016 Democratic Presidential Primary: Hillary Clinton 55% - Joe Biden 8% - Elizabeth Warren 17% - (Suffolk Univ/Boston Herald 08/25/2014) chart & more info

Joe Biden
Hillary Clinton
  • Clinton +47