The reason I said that about Glen is because I know some people like him (with jobs similar to Glen's who were planning to start their own business at some point and who for whatever reason supported Ron Paul). But I think you're right, he probably never voted for a Republican other than Paul. Also lets not forget…

Here's my guess:
Rick: used to be a solid Republican until he met Lori who is more liberal, and now he avoids conversations about politics. He probably still votes for Repubs occasionally but tells Lori that she voted for the Democrat.
Glenn: Probably leans Libertarian. Possibly a Ron Paul fan.
Daryl: probably didn't…