I believe Pelosi and Reid are gambling on both houses consolidating their respective democratic majorities to pass major legislation like:

1) Amnesty for illegals
2) Energy bill that "saves" the planet and forces us to ride bikes and hug trees.
3) Obama's poverty act so we can be taxed for our happiness and alleviate the world poverty we are responsible for
4) get out of Iraq and gut our military further
5) so much more

This is going to be so great, i can't wait!