Chip Roy has won the Republican nomination in the 21st Congressional District of Texas. Roy won the runoff  with 52.7 percent of the vote beating businessman Matt McCall. When Congressman Lamar Smith announced he would retire instead of seeking re-election, 18 Republicans ran to replacing him.

Roy has worked for several different Republican elected officials, including Sen. Ted Cruz. According to Ben Philpott, Senior Editor for Austin’s NPR station KUT.  Roy received the most backing in the race.  That support included the endorsement of Smith and Cruz, as well about $1 million in outside spending by the Club for Growth super PAC — the same group that helped the underdog Cruz win his Senate seat in 2012.

Roy will face Democrat Joseph Kopser, in the November general election, which Roy is favored to win.