Romney's primary opponent, Mike Kennedy, would have stood with the president, even though he initiall supported Cruz in 2016.  He came around to be a pro-Trump candidate, where Romney was the ultimate never trumper who stood firmly against everything the President is trying to achieve.    Unfortunately Utah has many conservative "never trumper" types who live in a different world. https://www.sltrib.com/news/politics/2018/05/30/watch-live-mitt-romney-debates-mike-kennedy-in-republican-primary-for-orrin-hatchs-senate-seat/