you take the White House after the most unpopular US President of the last 100 years
your presidency is historic
you win the election by a huge margin, destroying your opponent
your party handily controls both houses of Congress
the other party, the GOP, is declared "dead," "irrelevant," "out of step with the American people," and virtually any other negative you can imagine
you were (supposedly) given a mandate by the American people, or were at least told by the mainstream media that you had that mandate
you win the Nobel Peace Prize (for talking nicely to/about Muslims, while sending more troops into enemy territory)
you have the keys to the country in your pocket...
but you and your party can't even pass health care reform or hold a Senate seat occupied by a Kennedy, in Mass., for decades.
I cannot imagine how the Democrats can be given anything other than an F for their party's overall incompetence.
I recognize that I'm oversimplifying a number of issues. I also recognize that other parties have done more with less. Look at the agenda that Newt Gengrich and the Republicans in 1994-96 were able to push while the White House was occupied by a Democrat. Love them or hate them, that crew knew how to get stuff done.