The Cook Partisan Voting Index, often abbreviated as PVI, is a measurement of how strongly a State or Congressional District leans Democrat or Republican, compared to the nation as a whole using Presidential elections as the baseline.

The index is updated after each Presidential election cycle. For PVI by Congressional District, see the US House Partisan Voting Index page. Note this State-by-State page is listed in the Senate section since it’s a strong indicator of which way any given state is likely to vote in its next US Senate race (in addition to the next Presidential race).

States Across US by PVI (Credit: SpeedMcCool – Wikipedia)
State > PVI as of 2016 Vote > Governor’s Party > Party in Senate > House Seats
  1. Alabama > R+14 > Republican > Both > 6R, 1D
  2. Alaska > R+9 > Republican > Republican > 1R
  3. Arizona > R+5 > Republican > Both > 5D, 4R
  4. Arkansas > R+15 > Republican > Republican > 4R
  5. California > D+12 > Democratic > Democratic > 46D, 7R
  6. Colorado > D+1 > Democratic > Both > 4D, 3R
  7. Connecticut > D+6 > Democratic > Democratic > 5D
  8. Delaware > D+6 > Democratic > Democratic > 1D
  9. District of Columbia1 > D+43 > N/A > N/A > N/A
  10. Florida > R+2 > Republican > Republican > 14R, 13D
  11. Georgia > R+5 > Republican > Republican > 9R, 5D
  12. Hawaii > D+18 > Democratic > Democratic > 2D
  13. Idaho > R+19 > Republican > Republican > 2R
  14. Illinois > D+7 > Democratic > Democratic > 13D, 5R
  15. Indiana > R+9 > Republican > Republican > 7R, 2D
  16. Iowa > R+3 > Republican > Republican > 3D, 1R
  17. Kansas > R+13 > Democratic > Republican > 3R, 1D
  18. Kentucky > R+15 > Republican > Republican > 5R, 1D
  19. Louisiana > R+11 > Democratic > Republican > 5R, 1D
  20. Maine > D+3 > Democratic > Both* > 2D
  21. Maryland > D+12 > Republican > Democratic > 7D, 1R
  22. Massachusetts > D+12 > Republican > Democratic > 9D
  23. Michigan > D+1 > Democratic > Democratic > 7D, 6R, 1I
  24. Minnesota > D+1 > Democratic > Democratic > 5D, 3R
  25. Mississippi > R+9 > Republican > Republican > 3R, 1D
  26. Missouri > R+9 > Republican > Republican > 6R, 2D
  27. Montana > R+11 > Democratic > Both > 1R
  28. Nebraska > R+14 > Republican > Republican > 3R
  29. Nevada > D+1 > Democratic > Democratic > 3D, 1R
  30. New Hampshire > EVEN > Republican > Democratic > 2D
  31. New Jersey > D+7 > Democratic > Democratic > 11D, 1R
  32. New Mexico > D+3 > Democratic > Democratic > 3D
  33. New York > D+12 > Democratic > Democratic > 21D, 6R
  34. North Carolina > R+3 > Democratic > Republican > 10R, 3D
  35. North Dakota > R+17 > Republican > Republican > 1R
  36. Ohio > R+3 > Republican > Both > 12R, 4D
  37. Oklahoma > R+20 > Republican > Republican > 4R, 1D
  38. Oregon > D+5 > Democratic > Democratic > 4D, 1R
  39. Pennsylvania > EVEN > Democratic > Both > 9D, 9R
  40. Rhode Island > D+10 > Democratic > Democratic > 2D
  41. South Carolina > R+8 > Republican > Republican > 5R, 2D
  42. South Dakota > R+14 > Republican > Republican > 1R
  43. Tennessee > R+14 > Republican > Republican > 7R, 2D
  44. Texas > R+8 Republican > Republican > 23R, 13D
  45. Utah > R+20 > Republican > Republican > 3R, 1D
  46. Vermont > D+15 > Republican > Democratic2 > 1D
  47. Virginia > D+1 > Democratic > Democratic > 7D, 4R
  48. Washington > D+7 > Democratic > Democratic > 7D, 3R
  49. West Virginia > R+19 > Republican > Both > 3R
  50. Wisconsin > EVEN > Democratic > Both > 5R, 3D
  51. Wyoming > R+25 > Republican > Republican > 1R

1 Per the 23rd Amendment, DC is entitled to three Electoral Votes

2Vermont has an independent senator who caucuses with the Democrats

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