The 2016 Arizona Republican presidential primary took place on March 22 in the U.S. state of Arizona as one of the Republican Party's primaries ahead of the 2016 presidential election. Despite a late challenge by Texas Senator Ted Cruz, Donald Trump won the primary and netted all 58 delegates in the winner-take-all contest.
On the same day were held Democratic and Green primaries in Arizona, as well as Republican and Democratic caucuses in Utah and Idaho Democratic caucus, so the day was dubbed "Western Tuesday" by media.