There aren't a lot of Ds in Wyoming, the call for their vote, which is very common with Rs running in Wyoming, won't be enough to sway any election imo.Why not? If tens of thousands of little Trumpsters stay home or vote "D" in the fall to get Cheney out, of course its possible.
Wyoming may have a high majority of R's, but if there were a lot of D's as well, Cheney wouldn't be appealing to them to cross over.