SALT LAKE CITY, March 19 (UPI) -- The Republican presidential campaign has come to Utah, where front-runner Donald Trump and one of his harshest critics, 2012 nominee Mitt Romney, are fighting bitterly ahead of the state's caucuses Tuesday.
Trump campaigned in Salt Lake City on Friday, praising all the friends he has who are Mormon. He then questioned Romney's Mormon faith.
"Do I love the Mormons? I have many friends that live in Salt Lake City -- and by the way, Mitt Romney is not one of them," Trump said to applause. "Are you sure he's a Mormon? Are we sure?"
Prior to Ohio's contest, Romney campaigned with that state's governor, John Kasich, hoping to boost him to a victory there — and it worked.
Romney, has not formally endorsed any candidate, but instead is encouraging voters to select the most viable candidate to defeat Trump in their home states in a ploy to deny Trump the number of delegates he needs to secure the Republican nomination.
Trump attacked Romney for working with multiple candidates.
"First he's campaigning with Kasich, then he endorses Cruz. ... People say, 'are you sure you know what you're doing?'"
And while Trump attacks Romney, a new ad from a Super PAC whose mission is to deny Trump the nomination is using clips from Romney's first speech attacking Trump in a commercial playing in Utah.
Our Principles PAC has spent $250,000 to show the ad on local television. It features still photos of a fiery Trump married with Romney solemnly saying Trump is not fit to hold office.