Cori Bush defeated incumbent William Lacy Clay and Katherine Bruckner in Missouri’s 1st Congressional District Democratic primary. Bush received 49% of the vote to Clay’s 46%. Clay is one of seven incumbent representatives who have lost in primaries in 2020.
Bush challenged Clay in the district’s 2018 primary, which Clay won with 57% of the vote to Bush’s 37%. Clay was first elected in 2000. U.S. Sen. Kamala Harris (D-Calif.) and the St. Louis Post-Dispatch endorsed his re-election bid.
Bush received endorsements from U.S. Sen. Bernie Sanders (I-Vt.) and Jamaal Bowman, a candidate for New York’s 16th District who defeated 16-term incumbent Rep. Eliot Engel in the district’s June 23 Democratic primary.