Cornyn backed some gun control measures. Massie opposed them all. It may not have helped either.

Gun safety advocacy group Giffords argues that pro-firearm lobbies have waning power after sitting out primaries for both gun control opponent Rep. Thomas Massie and gun safety supporter Sen. John Cornyn. A poll shows that attacks on Cornyn's gun record are less resonant than other criticisms among Texas GOP voters in his runoff race.