Cook Partisan Voting Index

Last updated

Map by state after the 2016 election US CPVI after 2016.svg
Map by state after the 2016 election

The Cook Partisan Voting Index, often abbreviated as CPVI or PVI, is a measurement of how strongly a United States congressional district or state leans toward the Democratic or Republican Party, compared to the nation as a whole. The index is updated after each election cycle. The Cook Political Report introduced the PVI in August 1997 to better gauge the competitiveness of each district using the 1992 and 1996 presidential elections as a baseline. [1] The index is based on analysis by the Center for Voting and Democracy (now FairVote) for its July 1997 Monopoly Politics report. [2]

Contents

Calculation and format

PVIs are calculated by comparing a congressional district's average Democratic or Republican Party share of the two-party presidential vote in the past two presidential elections to the national average share for those elections. For example, the national average for 2004 and 2008 was 51.2% Democratic to 48.8% Republican. [1] In Alaska's at-large congressional district, the Republican candidate won 63% and 61% of the two-party share in the 2004 and 2008 presidential elections, respectively. Comparing the average of these two district results (62%) against the average national share (48.8%), this district voted 13.2 percentage points more Republican than the country as a whole, or R+13.[ citation needed ]

A map of House of Representatives districts by Cook Partisan Voting Index PVI in US Congressional Districts.png
A map of House of Representatives districts by Cook Partisan Voting Index

Prior to its April 2009 update, the PVI formula compared district-level results for the past two presidential elections to nationwide results for only the most recent election. Since then, local elections are compared to synchronic national elections. [3] [ better source needed ]

The Cook PVI is displayed as a letter, a plus sign, and a number. The letter (either a D for Democratic or an R for Republican) reflects the major party toward which the district (or state) leans. The number reflects the strength of that partisan preference in rounded percentage points. A district or state without a partisan tilt is designated as "EVEN".[ citation needed ]

Lists

By congressional district

This table is sourced from the Cook Political Report's 2016 analysis for districts of the 116th United States Congress, calculated according to the results of the 2012 and the 2016 U.S. presidential elections. [4] The party representations are based on the winners of the 2018 U.S. House elections. In the House, there are 235 districts that lean Republican and 192 districts that lean Democratic.[ citation needed ] The number of swing seats, defined as those between D+5 and R+5, is 73.

The district-by-district list has been collapsed to save space. To show the full list, please click the word "show" in the table below.

DistrictPVIParty of
representative
Alabama 1 R+15Republican
Alabama 2 R+16Republican
Alabama 3 R+16Republican
Alabama 4 R+30Republican
Alabama 5 R+18Republican
Alabama 6 R+26Republican
Alabama 7 D+20Democratic
Alaska at-large R+9Republican
Arizona 1 R+2Democratic
Arizona 2 R+1Democratic
Arizona 3 D+13Democratic
Arizona 4 R+21Republican
Arizona 5 R+15Republican
Arizona 6 R+9Republican
Arizona 7 D+23Democratic
Arizona 8 R+13Republican
Arizona 9 D+4Democratic
Arkansas 1 R+17Republican
Arkansas 2 R+7Republican
Arkansas 3 R+19Republican
Arkansas 4 R+17Republican
California 1 R+11Republican
California 2 D+22Democratic
California 3 D+5Democratic
California 4 R+10Republican
California 5 D+21Democratic
California 6 D+21Democratic
California 7 D+3Democratic
California 8 R+9Republican
California 9 D+8Democratic
California 10 EVENDemocratic
California 11 D+21Democratic
California 12 D+37Democratic
California 13 D+40Democratic
California 14 D+27Democratic
California 15 D+20Democratic
California 16 D+9Democratic
California 17 D+25Democratic
California 18 D+23Democratic
California 19 D+24Democratic
California 20 D+23Democratic
California 21 D+5Democratic
California 22 R+8Republican
California 23 R+14Republican
California 24 D+7Democratic
California 25 EVENDemocratic
California 26 D+7Democratic
California 27 D+16Democratic
California 28 D+23Democratic
California 29 D+29Democratic
California 30 D+18Democratic
California 31 D+8Democratic
California 32 D+17Democratic
California 33 D+16Democratic
California 34 D+35Democratic
California 35 D+19Democratic
California 36 D+2Democratic
California 37 D+37Democratic
California 38 D+17Democratic
California 39 EVENDemocratic
California 40 D+33Democratic
California 41 D+12Democratic
California 42 R+9Republican
California 43 D+29Democratic
California 44 D+35Democratic
California 45 R+3Democratic
California 46 D+15Democratic
California 47 D+13Democratic
California 48 R+4Democratic
California 49 R+1Democratic
California 50 R+11Republican
California 51 D+22Democratic
California 52 D+6Democratic
California 53 D+14Democratic
Colorado 1 D+21Democratic
Colorado 2 D+9Democratic
Colorado 3 R+6Republican
Colorado 4 R+13Republican
Colorado 5 R+14Republican
Colorado 6 D+2Democratic
Colorado 7 D+6Democratic
Connecticut 1 D+12Democratic
Connecticut 2 D+3Democratic
Connecticut 3 D+9Democratic
Connecticut 4 D+7Democratic
Connecticut 5 D+2Democratic
Delaware at-large D+6Democratic
Florida 1 R+22Republican
Florida 2 R+18Republican
Florida 3 R+9Republican
Florida 4 R+17Republican
Florida 5 D+12Democratic
Florida 6 R+7Republican
Florida 7 EVENDemocratic
Florida 8 R+11Republican
Florida 9 D+5Democratic
Florida 10 D+11Democratic
Florida 11 R+15Republican
Florida 12 R+8Republican
Florida 13 D+2Democratic
Florida 14 D+7Democratic
Florida 15 R+6Republican
Florida 16 R+7Republican
Florida 17 R+13Republican
Florida 18 R+5Republican
Florida 19 R+13Republican
Florida 20 D+31Democratic
Florida 21 D+9Democratic
Florida 22 D+6Democratic
Florida 23 D+11Democratic
Florida 24 D+34Democratic
Florida 25 R+4Republican
Florida 26 D+6Democratic
Florida 27 D+5Democratic
Georgia 1 R+9Republican
Georgia 2 D+6Democratic
Georgia 3 R+18Republican
Georgia 4 D+24Democratic
Georgia 5 D+34Democratic
Georgia 6 R+8Democratic
Georgia 7 R+9Republican
Georgia 8 R+15Republican
Georgia 9 R+31Republican
Georgia 10 R+15Republican
Georgia 11 R+17Republican
Georgia 12 R+9Republican
Georgia 13 D+20Democratic
Georgia 14 R+27Republican
Hawaii 1 D+17Democratic
Hawaii 2 D+19Democratic
Idaho 1 R+21Republican
Idaho 2 R+17Republican
Illinois 1 D+27Democratic
Illinois 2 D+29Democratic
Illinois 3 D+6Democratic
Illinois 4 D+33Democratic
Illinois 5 D+20Democratic
Illinois 6 R+2Democratic
Illinois 7 D+38Democratic
Illinois 8 D+8Democratic
Illinois 9 D+18Democratic
Illinois 10 D+10Democratic
Illinois 11 D+9Democratic
Illinois 12 R+5Republican
Illinois 13 R+3Republican
Illinois 14 R+5Democratic
Illinois 15 R+21Republican
Illinois 16 R+8Republican
Illinois 17 D+3Democratic
Illinois 18 R+15Republican
Indiana 1 D+8Democratic
Indiana 2 R+11Republican
Indiana 3 R+18Republican
Indiana 4 R+17Republican
Indiana 5 R+9Republican
Indiana 6 R+18Republican
Indiana 7 D+11Democratic
Indiana 8 R+15Republican
Indiana 9 R+13Republican
Iowa 1 D+1Democratic
Iowa 2 D+1Democratic
Iowa 3 R+1Democratic
Iowa 4 R+11Republican
Kansas 1 R+24Republican
Kansas 2 R+10Republican
Kansas 3 R+4Democratic
Kansas 4 R+15Republican
Kentucky 1 R+23Republican
Kentucky 2 R+19Republican
Kentucky 3 D+6Democratic
Kentucky 4 R+18Republican
Kentucky 5 R+31Republican
Kentucky 6 R+9Republican
Louisiana 1 R+24Republican
Louisiana 2 D+25Democratic
Louisiana 3 R+20Republican
Louisiana 4 R+13Republican
Louisiana 5 R+15Republican
Louisiana 6 R+19Republican
Maine 1 D+8Democratic
Maine 2 R+2Democratic
Maryland 1 R+14Republican
Maryland 2 D+11Democratic
Maryland 3 D+13Democratic
Maryland 4 D+28Democratic
Maryland 5 D+16Democratic
Maryland 6 D+6Democratic
Maryland 7 D+26Democratic
Maryland 8 D+14Democratic
Massachusetts 1 D+12Democratic
Massachusetts 2 D+9Democratic
Massachusetts 3 D+9Democratic
Massachusetts 4 D+9Democratic
Massachusetts 5 D+18Democratic
Massachusetts 6 D+6Democratic
Massachusetts 7 D+34Democratic
Massachusetts 8 D+10Democratic
Massachusetts 9 D+4Democratic
Michigan 1 R+9Republican
Michigan 2 R+9Republican
Michigan 3 R+6Independent
Michigan 4 R+10Republican
Michigan 5 D+5Democratic
Michigan 6 R+4Republican
Michigan 7 R+7Republican
Michigan 8 R+4Democratic
Michigan 9 D+4Democratic
Michigan 10 R+13Republican
Michigan 11 R+4Democratic
Michigan 12 D+14Democratic
Michigan 13 D+33Democratic
Michigan 14 D+30Democratic
Minnesota 1 R+5Republican
Minnesota 2 R+2Democratic
Minnesota 3 D+1Democratic
Minnesota 4 D+14Democratic
Minnesota 5 D+26Democratic
Minnesota 6 R+12Republican
Minnesota 7 R+12Democratic
Minnesota 8 R+4Republican
Mississippi 1 R+16Republican
Mississippi 2 D+14Democratic
Mississippi 3 R+13Republican
Mississippi 4 R+21Republican
Missouri 1 D+29Democratic
Missouri 2 R+8Republican
Missouri 3 R+18Republican
Missouri 4 R+17Republican
Missouri 5 D+7Democratic
Missouri 6 R+16Republican
Missouri 7 R+23Republican
Missouri 8 R+24Republican
Montana at-large R+11Republican
Nebraska 1 R+11Republican
Nebraska 2 R+4Republican
Nebraska 3 R+27Republican
Nevada 1 D+15Democratic
Nevada 2 R+7Republican
Nevada 3 R+2Democratic
Nevada 4 D+3Democratic
New Hampshire 1 R+2Democratic
New Hampshire 2 D+2Democratic
New Jersey 1 D+13Democratic
New Jersey 2 R+1Republican
New Jersey 3 R+2Democratic
New Jersey 4 R+8Republican
New Jersey 5 R+3Democratic
New Jersey 6 D+9Democratic
New Jersey 7 R+3Democratic
New Jersey 8 D+27Democratic
New Jersey 9 D+16Democratic
New Jersey 10 D+36Democratic
New Jersey 11 R+3Democratic
New Jersey 12 D+16Democratic
New Mexico 1 D+7Democratic
New Mexico 2 R+6Democratic
New Mexico 3 D+8Democratic
New York 1 R+5Republican
New York 2 R+3Republican
New York 3 D+1Democratic
New York 4 D+4Democratic
New York 5 D+37Democratic
New York 6 D+16Democratic
New York 7 D+38Democratic
New York 8 D+36Democratic
New York 9 D+34Democratic
New York 10 D+26Democratic
New York 11 R+3Democratic
New York 12 D+31Democratic
New York 13 D+43Democratic
New York 14 D+29Democratic
New York 15 D+44Democratic
New York 16 D+24Democratic
New York 17 D+7Democratic
New York 18 R+1Democratic
New York 19 R+2Democratic
New York 20 D+7Democratic
New York 21 R+4Republican
New York 22 R+6Democratic
New York 23 R+6Republican
New York 24 D+3Republican
New York 25 D+8Democratic
New York 26 D+11Democratic
New York 27 R+11Republican
North Carolina 1 D+17Democratic
North Carolina 2 R+7Republican
North Carolina 3 R+12Republican
North Carolina 4 D+17Democratic
North Carolina 5 R+10Republican
North Carolina 6 R+9Republican
North Carolina 7 R+9Republican
North Carolina 8 R+8Republican
North Carolina 9 R+8Republican
North Carolina 10 R+12Republican
North Carolina 11 R+14Republican
North Carolina 12 D+18Democratic
North Carolina 13 R+6Republican
North Dakota at-large R+16Republican
Ohio 1 R+5Republican
Ohio 2 R+9Republican
Ohio 3 D+19Democratic
Ohio 4 R+14Republican
Ohio 5 R+11Republican
Ohio 6 R+16Republican
Ohio 7 R+12Republican
Ohio 8 R+17Republican
Ohio 9 D+14Democratic
Ohio 10 R+4Republican
Ohio 11 D+32Democratic
Ohio 12 R+7Republican
Ohio 13 D+7Democratic
Ohio 14 R+5Republican
Ohio 15 R+7Republican
Ohio 16 R+8Republican
Oklahoma 1 R+17Republican
Oklahoma 2 R+24Republican
Oklahoma 3 R+27Republican
Oklahoma 4 R+20Republican
Oklahoma 5 R+10Democratic
Oregon 1 D+9Democratic
Oregon 2 R+11Republican
Oregon 3 D+24Democratic
Oregon 4 EVENDemocratic
Oregon 5 EVENDemocratic
Pennsylvania 1 R+1Republican
Pennsylvania 2 D+25Democratic
Pennsylvania 3 D+41Democratic
Pennsylvania 4 D+7Democratic
Pennsylvania 5 D+13Democratic
Pennsylvania 6 D+2Democratic
Pennsylvania 7 D+1Democratic
Pennsylvania 8 R+1Democratic
Pennsylvania 9 R+14Republican
Pennsylvania 10 R+6Republican
Pennsylvania 11 R+14Republican
Pennsylvania 12 R+17Republican
Pennsylvania 13 R+22Republican
Pennsylvania 14 R+14Republican
Pennsylvania 15 R+20Republican
Pennsylvania 16 R+8Republican
Pennsylvania 17 R+3Democratic
Pennsylvania 18 D+13Democratic
Rhode Island 1 D+14Democratic
Rhode Island 2 D+6Democratic
South Carolina 1 R+10Democratic
South Carolina 2 R+12Republican
South Carolina 3 R+19Republican
South Carolina 4 R+15Republican
South Carolina 5 R+9Republican
South Carolina 6 D+19Democratic
South Carolina 7 R+9Republican
South Dakota at-large R+14Republican
Tennessee 1 R+28Republican
Tennessee 2 R+20Republican
Tennessee 3 R+18Republican
Tennessee 4 R+20Republican
Tennessee 5 D+7Democratic
Tennessee 6 R+24Republican
Tennessee 7 R+20Republican
Tennessee 8 R+19Republican
Tennessee 9 D+28Democratic
Texas 1 R+25Republican
Texas 2 R+11Republican
Texas 3 R+13Republican
Texas 4 R+28Republican
Texas 5 R+16Republican
Texas 6 R+9Republican
Texas 7 R+7Democratic
Texas 8 R+28Republican