From Andrew Sullivan, "Obama Happens"

This Arianna smackdown of Hillary made me smile.

And more kudos from a Republican,...Mark McKinnon, who was a top adviser to President Bush in his White House runs and who is a senior adviser to Sen. John McCain: “I think Barack Obama is the most interesting persona to appear on the political radar screen in decades. … He’s a walking, talking hope machine, and he may reshape American politics.”