Trump ally Adam Laxalt wins Nevada's Republican U.S. Senate primary

Former Nevada Attorney General Adam Laxalt won the state's U.S. Senate GOP primary Tuesday. He will face Democratic Sen. Catherine Cortez Masto in one of November's closely watched races. (John Locher/AP)

Adam Laxalt, a former Nevada attorney general, won the Republican U.S. Senate primary in the state Tuesday, according to a race call from The Associated Press.

He will take on incumbent Sen. Catherine Cortez Masto in November in a high-stakes race as Democrats try to hold on to their slim majority in the upper chamber.