Texas Democrats staying in Illinois after fleeing the state in opposition of Republican-led redistricting effort were evacuated from their hotel over a bomb threat, local law enforcement said on Wednesday.

Gov. JB Pritzker vowed on late-night television to protect Texas House Democrats who fled to Illinois to try and stop the Republican-controlled state legislature from redrawing congressional district boundaries to the GOP’s advantage ahead of next year’s midterm election.

Texas Democrats are in Illinois to block a vote on a new congressional map that aims to shore up Republicans power in Congress.