I love Right Work States! :-D
I believe you’re looking for “at-will employment”.
That said, letting political preference cloud sound business judgment is not the wisest(or most profitable) idea. It can cut both ways and leave money on the table. One can look at economics to see how this is likely to pan out.
He is always free to choose a path that harms his long-term prosperity (by helping his competition) in exchange for short term gains.
I believe that this falls under Utah being an “employment at will” state.