[OKSooner]

A little of his material comes from the left, but by and large, he's conservative.

Nah. He's just "seen the light" and has reinvented himself as a conservative.

[Space Wrangler]

Perhaps he's seen the explosive success of FOXNews, and realizes there is a gold mine audience out there begging for entertainment. Fox has revealed a 'hidden' treasure trove of people that are not being given what they want by Hollyweird/Big Media. Dennis Miller seems to have come to his senses, but I'll hold out and see where he goes with it. Maybe some other stars will be emboldened to come out of the 'conservative closet'.

[VMI70]

...and I can tell you exactly when he underwent his conversion--when he had children. It was a sea change transformation.
I would be a real fan were it not for his wholly unnecessary vulgarity. He is way too bright to have to rely on profanity as a comedic crutch.