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
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Senate Republican leader Mitch McConnell tells Fox News' Neil Cavuto that a repeal of the Affordable Care Act will still not be possible under a Republican Senate. Fox News hide caption
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
Libertarian North Carolina Senate candidate Sean Haugh tweets his views on his support from American Future Fund. Twitter/Sean Haugh hide caption
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
Former South Dakota GOP Gov. Mike Rounds is suddenly in a tough battle for an open Senate seat after Democrats and the Mayday PAC said they will spend $1 million each to defeat him. Nora Hertel/AP hide caption
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
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
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
Rep. Nick Rahall, D-W.Va., (right) poses with House Speaker John Boehner at the start of his 19th term last year. Rahall is running for re-election in a district that President Obama lost by 32 points in 2012. J. Scott Applewhite/AP hide caption
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
Gen. George Pickett Brady-Handy Photograph Collection/Library of Congress hide caption
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
Texas Gov. Rick Perry speaks Thursday at the Heritage Foundation in Washington. Manuel Balce Ceneta/AP hide caption