Because he would lose in Utah. This is why primaries are usually far more important for involvement than the general in some cases, particularly in safe seat districts like Utah.
I consider the Democrat Party the single-most evil entity in the history of the United States, and to a certain extension the history of the planet. And vichy Republicans who side with them are even worse, in my opinion. And traitors should always be treated much more harshly than the enemy.
So he is winning in Utah because he SAYS he is a republican..... constituents in Utah CANT SEE he is really a Dem REALLY????