A Fort Worth lawmaker’s sit-in on the Texas House floor picked up steam late Tuesday as fellow Democrats flocked to her side for the second night of her round-the-clock vigil after she refused to allow a state trooper to shadow her until the chamber could vote on a new congressional map.

Democratic Texas state Rep. Nicole Collier spent the night on the Texas House floor in protest after refusing a Republican demand to be placed under the watch of the state Department of Public Safety.

Texas House Democrats are 'ripping the slip' to show solidarity with state Rep. Nicole Collier ahead of Wednesday's vote on the controversial Texas congressional redistricting maps.

Collier stayed on the House floor overnight, sleeping in the chamber, alongside two other lawmakers, House Democratic Caucus Chair State Rep. Gene Wu (D-Houston) and State Rep. Vince Perez (D-El Paso).

The Texas Capitol building in Austin was partly evacuated on Tuesday amid an active shooter alert. Several state representatives and local media outlets posted videos from the scene, showing chaos. Officers could be seen escorting people off the campus.