Twenty-one members of the U.S. House of Representatives and 472 state legislators ran for other elected positions in 2018. Nine (43 percent) House members won election to statewide office, while 217 (46 percent) state legislators successfully won election to a new position.
Democratic House members were more successful in their runs than Republicans. Of the 10 Democratic House members who sought statewide office, six (60 percent) won in the general election, while only three of 11 (27 percent) Republican House members won their election.
Among state legislators, Republicans were more successful. Forty-eight percent (131 out of 274) of Republican state legislators who ran for another office won election to a new position, while 44 percent (82 out of 185) of Democratic state legislators who ran for another office were successful.
For more information, including a listing of the U.S. House members who ran for statewide office and a state-by-state breakdown of the results of state legislators who ran for other offices in 2018, click here: https://ballotpedia.org/Results_of_elected_officials_seeking_other_offices,_2018