LAS VEGAS — Trump-endorsed U.S. Senate candidate Adam Laxalt has survived an unexpected challenge to win the Republican primary in Nevada. With 83 percent of the precincts reporting at 7:27 a.m. p.m. ET on June 15, Laxalt received 56 percent of the vote. As expected, incumbent Sen. Catherine Cortez Masto (D-Nev.) easily dismissed her three…