Democrats seemed to really outperform across much of the southwest (Arizona, New Mexico, Colorado... especially Colorado). I do think something else is going on. Probably California influence as people move out of the state.
Utah is surrounded by 4 states in the blue Sunbelt.
So the theory is that the influence of Utah makes those other 4 states vote Dem? It is like they look at Utah, and the say, "yuck, we don't want that"?
I don't think he was saying it has an influence one way or another just that it's the only holdout. It seems to be trending blue too but not as fast and it started off so republican that it would be hard to flip for a very long time. I could see the Salt Lake City congressional district eventually becoming a democratic district though.