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S.V. Dáte

It's a long shot, but there's a scenario where control of the Senate might not be known until Jan. 6 — three days after the start of the next Congress. That's when Republican David Perdue and Democrat Michelle Nunn will face each other in a Georgia runoff if one of them fails to win 50 percent on Tuesday. David Tulis/AP hide caption

itoggle caption David Tulis/AP

The flier sent to Montana voters by political scientists at Stanford University and Dartmouth College to study voter interest in nonpartisan races. Fliers were also sent to voters in California and New Hampshire. Stanford University/Dartmouth College hide caption

itoggle caption Stanford University/Dartmouth College

This fan at the base of the lectern for Democratic gubernatorial candidate Charlie Crist Wednesday delayed the gubernatorial debate between Crist and Governor Rick Scott. The Scott campaign believed the fan violated the debate rules. CBS 4 Pool/AP hide caption

itoggle caption CBS 4 Pool/AP

President Obama, is watched by Mark Miller, back second from left, Ellyn Miller, and their son Jake Miller, left, as he signs the Gabriella Miller Kids First Research Act, into law in the Oval Office this spring. The Democratic and Republican parties complained to the Federal Election Commission that the law took away public funding for their political conventions. Manuel Balce Ceneta/AP hide caption

itoggle caption Manuel Balce Ceneta/AP

Republican strategist Karl Rove's Crossroads GPS group is planning to spend at least $23 million in key Senate races in the final two months of the campaign. The group is a tax-exempt non-profit and is allowed to keep the names of its donors secret. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Vice President Biden laughs as he is introduced by DNC Chair Rep. Debbie Wasserman Schultz, D-Fla., at the DNC Women's Leadership conference in Washington, Friday. At the event, Biden praised former GOP Sen. Bob Packwood, who resigned from the Senate in 1995 after allegations of sexual misconduct. Manuel Balce Ceneta/AP hide caption

itoggle caption Manuel Balce Ceneta/AP

Senate Majority Leader Harry Reid of Nevada (left) talks with Senate Minority Leader Mitch McConnell of Kentucky. The two Senate leaders were on opposite sides of a proposed constitutional amendment to limit fundraising and spending in campaign politics. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Congressional Budget Office Director Douglas Elmendorf is reflected on a tabletop as he speaks about the office's annual Budget and Economic Outlook during an October 2013 news conference in Washington. A CBO study released Thursday projects a slight increase in the 2014 budget deficit. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP