Why aren't Democrats more enthusiastic this year?

With all Obama's "accomplishments," by which I mean such disasters as nationalized auto manufacturers, Obamacare, and Porkulus, one would think that the Democrat donors would be writing big checks and Democrat voters would be enthusiastic about going to the polls on November 2.  But, they aren't.  Michael Barone explains that it isn't just the lack of a public option in Obamacare:

For it is not economics but foreign policy that has motivated the left half of the Democratic Party over the last decade. . . . .

They hoped to see an abject and abrupt withdrawal of U.S. troops from Iraq within weeks of the Obama inauguration. They hoped to see a beginning of withdrawal from Afghanistan not in July 2011 but in the early months of 2009. They hoped to see the detention facility at Guantanamo closed and shuttered and the detainees tried in civilian courts or freed to regale the media with tales of torture.

The uncomfortable truth is that many -- not most, but many -- Democratic politicians and Democratic voters saw political benefit in an American defeat in Iraq.

In other words, the left-half of the Democrat party is disappointed in Obama because he is insufficiently anti-American.