As party whip, Cornyn is second in the GOP Senate leadership. He is the overwhelming favorite to win his third term in office during November's general election.
Cornyn has been dubbed too moderate by a small group of tea party activists. He faced a last-minute challenge from the right by Stockman, a fierce conservative and House renegade.
Read more: http://www.nbcdfw.com/news/local/US-Sen-Cornyn-Wins-Republican-Nomination-in-Texas-248477341.html
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.