Cornholio is a halfwit in politics, he’s seems ok in other areas
Let's analyze that rationally; I know -- not your strong suit. Don't worry, I'll walk you through it.
1. Sometimes I'm dumb, and sometimes I'm not. Well, that's a discontinuity.
Then there's:
2. I'm not dumb at all, you're just an easily emotionally triggered partisan, and that reaction is only triggered in you when politics is the subject.
Among competing hypotheses, that one which depends on the fewest requisite variables is the one most likely to be valid.