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Cook Partisan Voting Index

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Map of 20162020 Cook PVI for all voting entities in the 2024 United States presidential election (states, federal district, congressional districts of Maine and Nebraska)

Map legend:
  State or district has a Cook PVI of D+10 or greater
  State or district has a Cook PVI between D+5 and D+10
  State or district has a Cook PVI between D+2 and D+5
  State or district has a Cook PVI between EVEN and D+2
  State or district has a Cook PVI between EVEN and R+2
  State or district has a Cook PVI between R+2 and R+5
  State or district has a Cook PVI between R+5 and R+10
  State or district has a Cook PVI of R+10 or greater

The Cook Partisan Voting Index, abbreviated PVI or CPVI, is a measurement of how partisan a U.S. congressional district or U.S. state is.[1] This partisanship is indicated as lean towards either the Republican Party or the Democratic Party,[2] compared to the nation as a whole, based on how that district or state voted in the previous two presidential elections.[3][4]

History

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The Partisan Voting Index was developed in 1997 by Charlie Cook of The Cook Political Report, in conjunction with Clark Bensen and his political statistical analysis firm, Polidata, "as a means of providing a more accurate picture of the competitiveness".[5][6][7] It is based on the methodology introduced by Rob Richie of the Center for Voting and Democracy for the Center's July 1997 Monopoly Politics report.[8][9]

The Cook Political Report has since released new PVI scores every two years.[10] In 2021, the newsletter ended its relationship with Polidata and instead used Dave Leip's Atlas of U.S. Presidential Elections to calculate 2020's results.[7] The most recent iteration is the 2022 Cook Partisan Voting Index, which was released with an updated formula for calculating PVI values.[11]

Calculation and format

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The index looks at how every congressional district voted in the past two presidential elections combined and compares it to the national average.[12] The Cook PVI is displayed as a letter, a plus sign, and a number, with the letter (either a D for Democratic or an R for Republican) indicating the party that outperformed in the district and the number showing how many percentage points above the national average it received.[10] In 2022, the formula was updated to weigh the most recent presidential election more heavily than the prior election.[11]

By congressional district

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The PVIs for congressional districts are calculated based on the 2016 and 2020 presidential elections.[11] With a PVI of R+1, Michigan's 8th congressional district was determined to be the median congressional district, meaning that exactly 217 districts are more Democratic and 217 are more Republican than this district.[11] As of 2022, there are 222 districts in the House that are more Republican than the national average and 206 districts more Democratic than the national average. The number of swing seats, defined as those between D+5 and R+5, is 87.[11]

District PVI Party of representative
Alabama 1 R+16 Republican
Alabama 2 R+17 Republican
Alabama 3 R+19 Republican
Alabama 4 R+33 Republican
Alabama 5 R+17 Republican
Alabama 6 R+18 Republican
Alabama 7 D+14 Democratic
Alaska at-large R+8 Democratic
Arizona 1 R+2 Republican
Arizona 2 R+6 Republican
Arizona 3 D+24 Democratic
Arizona 4 D+2 Democratic
Arizona 5 R+11 Republican
Arizona 6 R+3 Republican
Arizona 7 D+15 Democratic
Arizona 8 R+10 Republican
Arizona 9 R+16 Republican
Arkansas 1 R+22 Republican
Arkansas 2 R+9 Republican
Arkansas 3 R+15 Republican
Arkansas 4 R+20 Republican
California 1 R+12 Republican
California 2 D+23 Democratic
California 3 R+4 Republican
California 4 D+17 Democratic
California 5 R+9 Republican
California 6 D+7 Democratic
California 7 D+17 Democratic
California 8 D+26 Democratic
California 9 D+5 Democratic
California 10 D+18 Democratic
California 11 D+37 Democratic
California 12 D+40 Democratic
California 13 D+4 Republican
California 14 D+22 Democratic
California 15 D+28 Democratic
California 16 D+26 Democratic
California 17 D+23 Democratic
California 18 D+21 Democratic
California 19 D+18 Democratic
California 20 R+16 Republican
California 21 D+9 Democratic
California 22 D+5 Republican
California 23 R+8 Republican
California 24 D+13 Democratic
California 25 D+6 Democratic
California 26 D+8 Democratic
California 27 D+4 Republican
California 28 D+16 Democratic
California 29 D+26 Democratic
California 30 D+23 Democratic
California 31 D+15 Democratic
California 32 D+20 Democratic
California 33 D+12 Democratic
California 34 D+32 Democratic
California 35 D+13 Democratic
California 36 D+21 Democratic
California 37 D+37 Democratic
California 38 D+14 Democratic
California 39 D+12 Democratic
California 40 R+2 Republican
California 41 R+3 Republican
California 42 D+22 Democratic
California 43 D+32 Democratic
California 44 D+24 Democratic
California 45 D+2 Republican
California 46 D+15 Democratic
California 47 D+3 Democratic
California 48 R+9 Republican
California 49 D+3 Democratic
California 50 D+14 Democratic
California 51 D+12 Democratic
California 52 D+18 Democratic
Colorado 1 D+29 Democratic
Colorado 2 D+17 Democratic
Colorado 3 R+7 Republican
Colorado 4 R+13 Republican
Colorado 5 R+9 Republican
Colorado 6 D+9 Democratic
Colorado 7 D+4 Democratic
Colorado 8 EVEN Democratic
Connecticut 1 D+12 Democratic
Connecticut 2 D+3 Democratic
Connecticut 3 D+7 Democratic
Connecticut 4 D+13 Democratic
Connecticut 5 D+3 Democratic
Delaware at-large D+7 Democratic
Florida 1 R+19 Republican
Florida 2 R+8 Republican
Florida 3 R+9 Republican
Florida 4 R+6 Republican
Florida 5 R+11 Republican
Florida 6 R+14 Republican
Florida 7 R+5 Republican
Florida 8 R+11 Republican
Florida 9 D+8 Democratic
Florida 10 D+14 Democratic
Florida 11 R+8 Republican
Florida 12 R+17 Republican
Florida 13 R+6 Republican
Florida 14 D+8 Democratic
Florida 15 R+4 Republican
Florida 16 R+7 Republican
Florida 17 R+10 Republican
Florida 18 R+13 Republican
Florida 19 R+13 Republican
Florida 20 D+25 Democratic
Florida 21 R+7 Republican
Florida 22 D+7 Democratic
Florida 23 D+5 Democratic
Florida 24 D+25 Democratic
Florida 25 D+9 Democratic
Florida 26 R+8 Republican
Florida 27 EVEN Republican
Florida 28 R+2 Republican
Georgia 1 R+9 Republican
Georgia 2 D+3 Democratic
Georgia 3 R+18 Republican
Georgia 4 D+27 Democratic
Georgia 5 D+32 Democratic
Georgia 6 R+11 Republican
Georgia 7 D+10 Democratic
Georgia 8 R+16 Republican
Georgia 9 R+22 Republican
Georgia 10 R+15 Republican
Georgia 11 R+11 Republican
Georgia 12 R+8 Republican
Georgia 13 D+28 Democratic
Georgia 14 R+22 Republican
Hawaii 1 D+14 Democratic
Hawaii 2 D+14 Democratic
Idaho 1 R+22 Republican
Idaho 2 R+14 Republican
Illinois 1 D+20 Democratic
Illinois 2 D+19 Democratic
Illinois 3 D+20 Democratic
Illinois 4 D+22 Democratic
Illinois 5 D+18 Democratic
Illinois 6 D+3 Democratic
Illinois 7 D+36 Democratic
Illinois 8 D+6 Democratic
Illinois 9 D+19 Democratic
Illinois 10 D+11 Democratic
Illinois 11 D+5 Democratic
Illinois 12 R+24 Republican
Illinois 13 D+3 Democratic
Illinois 14 D+4 Democratic
Illinois 15 R+22 Republican
Illinois 16 R+13 Republican
Illinois 17 D+2 Democratic
Indiana 1 D+3 Democratic
Indiana 2 R+14 Republican
Indiana 3 R+18 Republican
Indiana 4 R+18 Republican
Indiana 5 R+11 Republican
Indiana 6 R+19 Republican
Indiana 7 D+19 Democratic
Indiana 8 R+19 Republican
Indiana 9 R+16 Republican
Iowa 1 R+3 Republican
Iowa 2 R+4 Republican
Iowa 3 R+3 Republican
Iowa 4 R+16 Republican
Kansas 1 R+18 Republican
Kansas 2 R+11 Republican
Kansas 3 R+1 Democratic
Kansas 4 R+14 Republican
Kentucky 1 R+24 Republican
Kentucky 2 R+21 Republican
Kentucky 3 D+9 Democratic
Kentucky 4 R+19 Republican
Kentucky 5 R+32 Republican
Kentucky 6 R+9 Republican
Louisiana 1 R+23 Republican
Louisiana 2 D+25 Democratic
Louisiana 3 R+21 Republican
Louisiana 4 R+14 Republican
Louisiana 5 R+17 Republican
Louisiana 6 R+19 Republican
Maine 1 D+9 Democratic
Maine 2 R+6 Democratic
Maryland 1 R+11 Republican
Maryland 2 D+7 Democratic
Maryland 3 D+10 Democratic
Maryland 4 D+40 Democratic
Maryland 5 D+15 Democratic
Maryland 6 D+2 Democratic
Maryland 7 D+30 Democratic
Maryland 8 D+29 Democratic
Massachusetts 1 D+9 Democratic
Massachusetts 2 D+13 Democratic
Massachusetts 3 D+11 Democratic
Massachusetts 4 D+12 Democratic
Massachusetts 5 D+23 Democratic
Massachusetts 6 D+11 Democratic
Massachusetts 7 D+35 Democratic
Massachusetts 8 D+15 Democratic
Massachusetts 9 D+6 Democratic
Michigan 1 R+13 Republican
Michigan 2 R+16 Republican
Michigan 3 D+1 Democratic
Michigan 4 R+5 Republican
Michigan 5 R+15 Republican
Michigan 6 D+11 Democratic
Michigan 7 R+2 Democratic
Michigan 8 R+1 Democratic
Michigan 9 R+18 Republican
Michigan 10 R+3 Republican
Michigan 11 D+7 Democratic
Michigan 12 D+23 Democratic
Michigan 13 D+23 Democratic
Minnesota 1 R+7 Republican
Minnesota 2 D+1 Democratic
Minnesota 3 D+8 Democratic
Minnesota 4 D+17 Democratic
Minnesota 5 D+30 Democratic
Minnesota 6 R+12 Republican
Minnesota 7 R+19 Republican
Minnesota 8 R+8 Republican
Mississippi 1 R+18 Republican
Mississippi 2 D+11 Democratic
Mississippi 3 R+15 Republican
Mississippi 4 R+22 Republican
Missouri 1 D+27 Democratic
Missouri 2 R+7 Republican
Missouri 3 R+16 Republican
Missouri 4 R+23 Republican
Missouri 5 D+11 Democratic
Missouri 6 R+21 Republican
Missouri 7 R+24 Republican
Missouri 8 R+28 Republican
Montana 1 R+6 Republican
Montana 2 R+16 Republican
Nebraska 1 R+9 Republican
Nebraska 2 EVEN Republican
Nebraska 3 R+29 Republican
Nevada 1 D+3 Democratic
Nevada 2 R+8 Republican
Nevada 3 D+1 Democratic
Nevada 4 D+3 Democratic
New Hampshire 1 EVEN Democratic
New Hampshire 2 D+2 Democratic
New Jersey 1 D+10 Democratic
New Jersey 2 R+5 Republican
New Jersey 3 D+5 Democratic
New Jersey 4 R+14 Republican
New Jersey 5 D+4 Democratic
New Jersey 6 D+8 Democratic
New Jersey 7 R+1 Republican
New Jersey 8 D+22 Democratic
New Jersey 9 D+8 Democratic
New Jersey 10 D+30 Democratic
New Jersey 11 D+6 Democratic
New Jersey 12 D+12 Democratic
New Mexico 1 D+5 Democratic
New Mexico 2 D+1 Democratic
New Mexico 3 D+4 Democratic
New York 1 R+3 Republican
New York 2 R+3 Republican
New York 3 D+2 Democratic
New York 4 D+5 Republican
New York 5 D+30 Democratic
New York 6 D+15 Democratic
New York 7 D+31 Democratic
New York 8 D+26 Democratic
New York 9 D+25 Democratic
New York 10 D+35 Democratic
New York 11 R+6 Republican
New York 12 D+34 Democratic
New York 13 D+38 Democratic
New York 14 D+28 Democratic
New York 15 D+35 Democratic
New York 16 D+20 Democratic
New York 17 D+3 Republican
New York 18 D+1 Democratic
New York 19 EVEN Republican
New York 20 D+7 Democratic
New York 21 R+9 Republican
New York 22 D+1 Republican
New York 23 R+12 Republican
New York 24 R+11 Republican
New York 25 D+7 Democratic
New York 26 D+9 Democratic
North Carolina 1 D+2 Democratic
North Carolina 2 D+12 Democratic
North Carolina 3 R+15 Republican
North Carolina 4 D+16 Democratic
North Carolina 5 R+13 Republican
North Carolina 6 D+4 Democratic
North Carolina 7 R+8 Republican
North Carolina 8 R+20 Republican
North Carolina 9 R+6 Republican
North Carolina 10 R+22 Republican
North Carolina 11 R+8 Republican
North Carolina 12 D+13 Democratic
North Carolina 13 R+2 Democratic
North Carolina 14 D+6 Democratic
North Dakota at-large R+20 Republican
Ohio 1 D+2 Democratic
Ohio 2 R+25 Republican
Ohio 3 D+20 Democratic
Ohio 4 R+20 Republican
Ohio 5 R+15 Republican
Ohio 6 R+16 Republican
Ohio 7 R+7 Republican
Ohio 8 R+14 Republican
Ohio 9 R+3 Democratic
Ohio 10 R+4 Republican
Ohio 11 D+28 Democratic
Ohio 12 R+18 Republican
Ohio 13 R+1 Democratic
Ohio 14 R+9 Republican
Ohio 15 R+6 Republican
Oklahoma 1 R+14 Republican
Oklahoma 2 R+29 Republican
Oklahoma 3 R+24 Republican
Oklahoma 4 R+19 Republican
Oklahoma 5 R+12 Republican
Oregon 1 D+18 Democratic
Oregon 2 R+15 Republican
Oregon 3 D+22 Democratic
Oregon 4 D+4 Democratic
Oregon 5 D+2 Republican
Oregon 6 D+4 Democratic
Pennsylvania 1 EVEN Republican
Pennsylvania 2 D+20 Democratic
Pennsylvania 3 D+39 Democratic
Pennsylvania 4 D+7 Democratic
Pennsylvania 5 D+14 Democratic
Pennsylvania 6 D+5 Democratic
Pennsylvania 7 R+2 Democratic
Pennsylvania 8 R+4 Democratic
Pennsylvania 9 R+21 Republican
Pennsylvania 10 R+5 Republican
Pennsylvania 11 R+13 Republican
Pennsylvania 12 D+8 Democratic
Pennsylvania 13 R+25 Republican
Pennsylvania 14 R+18 Republican
Pennsylvania 15 R+21 Republican
Pennsylvania 16 R+13 Republican
Pennsylvania 17 EVEN Democratic
Rhode Island 1 D+12 Democratic
Rhode Island 2 D+4 Democratic
South Carolina 1 R+7 Republican
South Carolina 2 R+8 Republican
South Carolina 3 R+21 Republican
South Carolina 4 R+12 Republican
South Carolina 5 R+12 Republican
South Carolina 6 D+14 Democratic
South Carolina 7 R+11 Republican
South Dakota at-large R+16 Republican
Tennessee 1 R+30 Republican
Tennessee 2 R+18 Republican
Tennessee 3 R+19 Republican
Tennessee 4 R+22 Republican
Tennessee 5 R+9 Republican
Tennessee 6 R+17 Republican
Tennessee 7 R+10 Republican
Tennessee 8 R+21 Republican
Tennessee 9 D+22 Democratic
Texas 1 R+26 Republican
Texas 2 R+15 Republican
Texas 3 R+11 Republican
Texas 4 R+16 Republican
Texas 5 R+14 Republican
Texas 6 R+15 Republican
Texas 7 D+13 Democratic
Texas 8 R+16 Republican
Texas 9 D+26 Democratic
Texas 10 R+13 Republican
Texas 11 R+23 Republican
Texas 12 R+12 Republican
Texas 13 R+26 Republican
Texas 14 R+17 Republican
Texas 15 R+1 Republican
Texas 16 D+17 Democratic
Texas 17 R+14 Republican
Texas 18 D+23 Democratic
Texas 19 R+26 Republican
Texas 20 D+15 Democratic
Texas 21 R+13 Republican
Texas 22 R+11 Republican
Texas 23 R+5 Republican
Texas 24 R+10 Republican
Texas 25 R+19 Republican
Texas 26 R+13 Republican
Texas 27 R+13 Republican
Texas 28 D+3 Democratic
Texas 29 D+18 Democratic
Texas 30 D+27 Democratic
Texas 31 R+14 Republican
Texas 32 D+14 Democratic
Texas 33 D+24 Democratic
Texas 34 D+9 Democratic
Texas 35 D+21 Democratic
Texas 36 R+18 Republican
Texas 37 D+24 Democratic
Texas 38 R+12 Republican
Utah 1 R+12 Republican
Utah 2 R+11 Republican
Utah 3 R+13 Republican
Utah 4 R+16 Republican
Vermont at-large D+16 Democratic
Virginia 1 R+6 Republican
Virginia 2 R+2 Republican
Virginia 3 D+17 Democratic
Virginia 4 D+16 Democratic
Virginia 5 R+7 Republican
Virginia 6 R+14 Republican
Virginia 7 D+1 Democratic
Virginia 8 D+26 Democratic
Virginia 9 R+23 Republican
Virginia 10 D+6 Democratic
Virginia 11 D+18 Democratic
Washington 1 D+13 Democratic
Washington 2 D+9 Democratic
Washington 3 R+5 Democratic
Washington 4 R+11 Republican
Washington 5 R+8 Republican
Washington 6 D+6 Democratic
Washington 7 D+36 Democratic
Washington 8 D+1 Democratic
Washington 9 D+21 Democratic
Washington 10 D+7 Democratic
West Virginia 1 R+23 Republican
West Virginia 2 R+22 Republican
Wisconsin 1 R+3 Republican
Wisconsin 2 D+19 Democratic
Wisconsin 3 R+4 Republican
Wisconsin 4 D+25 Democratic
Wisconsin 5 R+14 Republican
Wisconsin 6 R+10 Republican
Wisconsin 7 R+12 Republican
Wisconsin 8 R+10 Republican
Wyoming at-large R+25 Republican

By state

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The PVIs for states are calculated based on the results of the U.S. presidential elections in 2016 and 2020.[13] The table below reflects the state of Congress and governors, based on the 2022 election results.

State PVI Party of
governor
Party
in Senate
House
balance
Alabama R+15 Republican Republican 6R, 1D
Alaska R+8 Republican Republican 1D
Arizona R+2 Democratic Democratic[nb 1] 6R, 3D
Arkansas R+16 Republican Republican 4R
California D+13 Democratic Democratic 40D, 12R
Colorado D+4 Democratic Democratic 5D, 3R
Connecticut D+7 Democratic Democratic 5D
Delaware D+7 Democratic Democratic 1D
Florida R+3 Republican Republican 20R, 8D
Georgia R+3 Republican Democratic 9R, 5D
Hawaii D+14 Democratic Democratic 2D
Idaho R+18 Republican Republican 2R
Illinois D+7 Democratic Democratic 14D, 3R
Indiana R+11 Republican Republican 7R, 2D
Iowa R+6 Republican Republican 4R
Kansas R+10 Democratic Republican 3R, 1D
Kentucky R+16 Democratic Republican 5R, 1D
Louisiana R+12 Republican Republican 5R, 1D
Maine D+2 Democratic Both[nb 2] 2D
Maryland D+14 Democratic Democratic 7D, 1R
Massachusetts D+15 Democratic Democratic 9D
Michigan R+1 Democratic Democratic 7D, 6R
Minnesota D+1 Democratic Democratic 4D, 4R
Mississippi R+11 Republican Republican 3R, 1D
Missouri R+10 Republican Republican 6R, 2D
Montana R+11 Republican Both 2R
Nebraska R+13 Republican Republican 3R
Nevada R+1 Republican Democratic 3D, 1R
New Hampshire D+1 Republican Democratic 2D
New Jersey D+6 Democratic Democratic 9D, 3R
New Mexico D+3 Democratic Democratic 3D
New York D+10 Democratic Democratic 16D, 10R
North Carolina R+3 Democratic Republican 7D, 7R
North Dakota R+20 Republican Republican 1R
Ohio R+6 Republican Both 10R, 5D
Oklahoma R+20 Republican Republican 5R
Oregon D+6 Democratic Democratic 4D, 2R
Pennsylvania R+2 Democratic Democratic 9D, 8R
Rhode Island D+8 Democratic Democratic 2D
South Carolina R+8 Republican Republican 6R, 1D
South Dakota R+16 Republican Republican 1R
Tennessee R+14 Republican Republican 8R, 1D
Texas R+5 Republican Republican 25R, 13D
Utah R+13 Republican Republican 4R
Vermont D+16 Republican Democratic[nb 3] 1D
Virginia D+3 Republican Democratic 6D, 5R
Washington D+8 Democratic Democratic 8D, 2R
Washington, D.C. D+43 Democratic[nb 4]
N/A
1D[nb 5]
West Virginia R+22 Republican Both[nb 6] 2R
Wisconsin R+2 Democratic Both 6R, 2D
Wyoming R+25 Republican Republican 1R

See also

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Notes

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  1. ^ Includes an independent senator who caucuses with the Democrats
  2. ^ Includes an independent senator who caucuses with the Democrats
  3. ^ Includes an independent senator who caucuses with the Democrats
  4. ^ Mayor of the District of Columbia
  5. ^ Non-voting delegates
  6. ^ Includes an independent senator who caucuses with the Democrats

References

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  1. ^ Paul, Megan; Zhang, Ruya; Liu, Bian; Saadai, Payam; Coakley, Brian A. (2022). "State-level political partisanship strongly correlates with health outcomes for US children". European Journal of Pediatrics. 181: 273–280. doi:10.1007/s00431-021-04203-y. PMID 34272984.
  2. ^ Cillizza, Chris (April 10, 2017). "A map that shows we really do live in two different Americas". CNN. Retrieved December 15, 2023.
  3. ^ Cillizza, Chris (March 14, 2018). "The differences between real grassroots and "Astroturf" matter". CNN. Retrieved November 29, 2020. Which brings me to the Cook Political Report's Partisan Voting Index or PVI. The goal of the PVI is to compare every congressional district to every other congressional district based on how it has performed in each of the last two presidential elections.
  4. ^ Benen, Steve (February 7, 2017). "There are 119 Republican House members who should be VERY nervous today". MSNBC. Retrieved November 29, 2020. To get a sense of a congressional district's political leanings, there's a helpful metric called the Partisan Voter Index, or PVI, created 20 years ago by the Cook Political Report.
  5. ^ Kurtz, Josh (June 8, 2005). "Future House Opportunities Abound (Maybe)". Roll Call. Retrieved December 22, 2023.
  6. ^ Daum, Courtenay; Duffy, Robert; Straayer, John, eds. (2011). State of Change. Boulder: University of Colorado Press. ISBN 978-1-4571-1154-9. Retrieved December 22, 2023.
  7. ^ a b "The Cook Partisan Voting Index (Cook PVI)". The Cook Political Report with Amy Walter. Cook Political Report. Retrieved December 22, 2023.
  8. ^ Cook, Charlie (August 11, 1997). "New Study Identifies 75 Seats That Should Be In Play for '98 Election". Roll Call. Retrieved January 18, 2024.
  9. ^ "Monopoly Politics". Center for Voting and Democracy. July 1997. Retrieved January 18, 2024.
  10. ^ a b Kane, Paul (April 8, 2023). "New report outlines the deep political polarization's slow and steady march". The Washington Post. Retrieved December 22, 2023.
  11. ^ a b c d e Wasserman, David (July 13, 2022). "Introducing the 2022 Cook Partisan Voting Index (Cook PVI)". The Cook Political Report with Amy Walter. Retrieved July 13, 2022.
  12. ^ Seib, Gerald (December 9, 1998). "GOP Moderates and the Agony Of Their Impeachment Choice". The Wall Street Journal. Retrieved December 22, 2023.
  13. ^ "2022 Cook PVI: State Map and List". The Cook Political Report with Amy Walter. July 12, 2022. Retrieved July 19, 2022.
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