The first was one they did not seek; The re-election of Harry Reid and the second is one they did not expect Nancy Pelosi poised to become the Democratic minority leader.
One of the many problems that the Obama administration had this cycle was they tried to make the case that the election of Republicans in congress was the return to Bush Bush Bush. This proved ineffective because president Bush has become more rather than less loved over the past two years but more importantly there is exactly a 0% chance that George Bush will ever be president again.
However as 2012 comes by, no matter how well or poorly they do with Nancy Pelosi as Minority Leader in the house and Harry Reid newly re-elected there is absolutely a 100% chance that a republican defeat will mean going back to the Pelosi/Reid agenda.
You can’t underestimate how important this is. Democrats were running away from Nancy Pelosi like there was no tomorrow in this last election. It will be interesting to see what they say in 2012 when they are running for seats again with the promise of putting Nancy Pelosi and company back in charge.