I have a friend previously registered as "No Preference" who didn't vote for Trump, but followed the Mueller nonsense voraciously, and at the conclusion said "so they made it all up." He boarded the Trump Train immediately afterwards, registered as a Republican (he's well aware of RINOs but wanted to spite democrats), and he has no interest at all in this impeachment, other than occasionally using it to shit all over democrats.

Obviously one guy isn't much of a sample pool, but google seems to be suggesting he's not the only one.