Utah, Alaska, and Kansas are three states where Republicans need to be mindful in the coming years. All three states trended towards Biden, are experiencing rapid population growth and noticeable demographic changes (i.e. becoming younger and more diverse), and contain metropolitan regions that could power a future Democratic victory (i.e. Salt Lake City, Anchorage, and Wichita/Lawrence/Overland Park). I wouldn't be surprised if all three are competitive swing states within the next 20 years, much less 50.
I’m pretty sure Utah swung and trended R in 2020.
That was because Trump gained the majority of the McMullin vote from 2016, although a substantial minority went to Biden. But Trump's performance in Utah last year was still significantly worse than how most Republicans have done there since the 1970s. Trump is the first Republican presidential nominee since Bob Dole in 1996, and one of only two since Goldwater in 1964 (Dole being the other), to never reach the 60% mark there. And Biden posted the best performance for a Democrat since Johnson in 1964. Moreover, the growth of the Salt Lake City metropolitan area poses potential problems for Republicans.