By staking his next two years on hundreds of billions of dollars of new or renewed tax cuts, Obama is alienating his own Democratic base in a way that could make him what Carter was: a one-term, ineffective "outsider" president. Back when he was a presidential candidate, Obama expressed surprising admiration for Reagan's game-changing, tax-cutting presidency. Maybe he's just been backed -- or backed himself -- into a Reaganite corner, but after the sweeping tax deal the president just made with Republicans, I'm wondering if he hadn't meant more than we thought at the time.