U.S. Rep Chip Roy, a vocal critic of Ken Paxton and a firebrand within the GOP, is running to take over for Paxton as Texas Attorney General. The Republican congressman announced his bid in an already relatively crowded field Thursday morning.

The policy chair of the House Freedom Caucus, Roy has made a name for himself as an outspoken member who isn't afraid to take unpopular positions if he believes it violates his principles.