He is just having a temper tantrum, because he was caught changing his post, and shown to be a liar.
If I were a hardcore lib like Decker, I would be pissed off too.
Imagine, for a year they bought into this dream of the new post racial president undoing the sins of Bush, being the first clean articulate black man to run for office, the transformational "One", etc only to see what he actually is - a failure.
Imagine all the promises Obama made to these people being let go one by one and how they feel about this.
Imagine having 60 seats in the Senate, the majority in the House, etc, and cant get crap done other than a pork bill?
So I dont blame Decker, he got duped like many of the Obama voters.