I'm not quite sure that Rogan has gone conservative yet. But I have noticed what the truth has done to people like Rogan, Russell Brand and even Bill Maher. When you actually start thinking for yourself and see beyond the liberal propaganda your eyes start to open.
It happened to Dennis Miller. He went from loony left when he was doing weekend update on Saturday Night Live to going on tours with Bill O'Reilly. Same with Adam Carolla, but he might've always been on the conservative side. But his buddy, Jimmy Kimmel, has and still drinks the liberal Kool-Aid.