Analyzing partisan splits in states holding U.S. Senate elections in 2022

Thirty-four Senate seats are up for election on November 8, 2022. Republicans currently hold 20 and Democrats hold 14. 

For seats up for election next year, we look at party differences between the current Senate incumbent and their state’s other senator, their state’s governor, and their state’s 2020 presidential winner.

Split Senate delegations

Seven states have senators from different parties in the 117th Senate: Maine, Montana, Ohio, Pennsylvania, Vermont, West Virginia, and Wisconsin. This is the fewest number of states with split Senate delegations in history, according to Eric Ostermeier of the University of Minnesota.

Four of the seven states with split delegations in 2021 have Senate seats up for election in 2022. Vermont has one Democratic senator and one independent senator who caucuses with Democrats, so three states with seats up for election have senators in different caucuses: Ohio, Pennsylvania, and Wisconsin. In all three, the seats up for election in 2022 are currently held by Republicans.

Senator’s vs. governor’s party

Eleven seats up for election are currently held by a senator of a different party than the state’s governor. Six seats held by Republican senators in states with Democratic governors are up. Five seats held by Democratic senators in states with Republican governors are up.

States won by presidential candidate of a different party

Democrats are not defending any Senate seats in states Donald Trump won in the 2020 presidential election. Republicans are defending two Senate seats in states Joe Biden won: Pennsylvania (held by Sen. Pat Toomey) and Wisconsin (held by Sen. Ron Johnson).

• In Pennsylvania, Biden defeated Trump (R) 50.0%-48.8%.

• In Wisconsin, Biden defeated Trump 49.5%-48.8%.

For additional information on the 2022 Senate elections, including outside race ratings and a full list of seats up for election, click below.,_2022

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