Texas Democrats are leaving the state in an attempt to prevent a vote on new congressional maps that Republicans hope will net them additional U.S. House seats.

The lawmakers’ absence means the lower chamber won’t have enough members present to function, stalling passage of a draft map Democrats have condemned as a political power grab.

Texas state House Democrats plan to leave to break quorum of a special session in which Republicans aim to pass a new congressional map that could net the GOP five seats.