With just minutes to go before the filing deadline, Republican Congressman Steve Stockman filed the necessary papers to run against Sen. John Cornyn in the Republican primary. Stockman also withdrew his application for his current congressional seat.

It’s a possibility that political pundits have been speculating about for months, after the fight in Washington over defunding the Affordable Care Act. Sen. Cornyn drew fire from the right flank of his party for not following Sen. Ted Cruz’s lead in risking a government shutdown over funding. Even though at least five other Republicans have filed as candidates for the seat, the threat of a high-profile challenger appeared to blow over as the filing deadline approached.

Stockman has drawn publicity in recent years as an instigator, most notably for bringing Ted Nugent to the State of the Union address after the conservative rock guitarist had been investigated by the Secret Service for threatening the president.