Voting is anonymous. He would have to tell someone how he voted for anyone to know. Unless you mean the primaries, in which case, he'd have to register for the party primary he wanted to vote in ahead of time. Having grown up in PA, I can tell you that it's common practice to change parties depending on which party has the more consequential primary. I've done this myself, multiple times. Maybe he's right wing. Maybe he's left wing. But Lemmy propagandists aren't going to wait to find out.