LAS VEGAS (AP) — Nikki Haley was swamped Tuesday in Nevada’s symbolic Republican presidential primary as GOP voters resoundingly picked the “none of these candidates” option on the ballot in a repudiation of the former U.N. ambassador who is the last remaining major rival to front-runner Donald Trump. Trump, the former president, didn’t compete in the primary, which doesn’t award any delegates needed to win the GOP nomination. He’s instead focused on caucuses that will be held Thursday and will help him move closer to becoming the Republican standard-bearer. That leaves the Republican results …