Whiny liberal disease
It's now about 2 months after the Democratic Party took the Evil Party to the woodshed and whipped them severely for being greedy, corrupt, and generally evil scumbuckets. The new session of congress hasn't begun yet, so they've not had the opportunity to prove one thing or another about how they'll actually govern, but there are some people -- and these are not Evil Party supporters who I'm talking about -- who have already tried and convicted the Stupid Party for "betraying" the electorate.
I ran, shrieking, from the Stupid Party when they wouldn't even try to filibuster the B*sh's torture amendment, so I'm not exactly what you'd call a Stupid Party sympathiser, but I'll keep my mouth shut about any betrayals until they've had a chance to happen! If the Democratic Party is planning to disappoint me, I can wait to be disappointed, and I won't while away the days building elaborate straw men, whacking them with a broom, then blaming the Democratic Party for the resulting cloud of chaff.
Yes, if the Democratic Party betrays me on same-sex marriage and torture, I'll be more than happy to insult them up and down the block. Ditto for taxes, getting the fuck out of Iraq (and Afghanistan; we've lost that war already, notwithstanding Mini-Me's leaping up and committing Canada to the sort of imperial atrocities that the United States has suddenly become infamous for), and trying the entire B*sh junta for high treason. But, you know, they haven't betrayed me yet, so I'll STFU until they do.
I wonder how many of the "the Democrats have betrayed us!!" people voted for Ralph Nader in 2000?