MAJORITY

• 16Mary "Heidi" Kathryn Heitkamp

  [D] ND, United States
• 565Sherrod Brown

  [D] OH, United States
• 480Amy Klobuchar

  [D] MN, United States
• 163Michael Bennet

  [D] CO, United States
• 17Joseph "Joe" Donnelly

  [D] IN, United States
• 13William "Mo" Cowan

  [D] MA, United States

MINORITY

• 265Mike Johanns

  [R] NE, United States
• 107John Hoeven

  [R] ND, United States
• 1,945Charles "Chuck" E. Grassley

  [R] IA, United States
• 588John R. Thune

  [R] SD, United States
• 87John Boozman

  [R] AR, United States