Texas Gov. Greg Abbott has set a special election to finish out former state Sen. Brian Birdwell's term after he resigned the seat to a take a position as an assistant U.S. secretary of defense.

Special election set to fill remainder of term in Senate District 22 Candidates must file to run in the special election in Senate District 22 with the Secretary of State no later than Aug. 20.

The winner of the special election will serve out the remainder of Birdwell's term, set to expire on Jan. 11. Republican state Rep. David Cook is running against Democrat Amy Martinez-Salas in the general election to replace Birdwell, also on Nov. 3. The Granbury senator had previously announced in June his intent not to seek reelection.