Republican Rep. Michele Bachmann's campaign says 2008 GOP presidential nominee Sen. John McCain is going to help her raise money and help retire $1 million in campaign debt.
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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.