On April 24, the night Mitt Romney triumphed in five primary contests and essentially clinched the Republican presidential nomination, the former Massachusetts governor delivered his victory speech in Manchester, the largest city in the swing state of New Hampshire.
33 out of 100 seats are up for election. 51 are needed for a majority.
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* 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.