Deepening economic pessimism has pushed down President Obama's approval rating to a near record low, but he holds an early advantage over prospective 2012 rivals in part because of widespread dissatisfaction with Republican candidates, according to a new Washington Post-ABC News poll.
33 out of 100 seats are up for election. 51 are needed for a majority.
|Seats gained or lost||+2||-2|
* Includes two independent senators expected to caucus with the Democrats: Angus King (Maine) and Sen. Bernie Sanders (Vt.).
All 435 seats are up for election. 218 are needed for a majority.