He might be a Republican, but I doubt he's a member of the right wing of the party. I don't believe his news coverage shows much bias to either party, but in fact, he's been accused of liberal leanings by some here on FR because of the negative news flash articles he's posted about Bush. I don't ever recall Matt claiming membership in any political party, and if he hosted Rush's program while he was in detox, then I'm sure it was because the labor pool to cover all that open time was limited, and they had to get people with radio experience from wherever they could, to fill the voids. I don't believe he ever subbed for Rush prior to his lengthy absence for rehab.