Republican U.S. Rep. Joe Walsh and challenger Democrat Tammy Duckworth before a televised debate at the WTTW studios on Oct. 18, 2012, in Chicago. Charles Rex Arbogast/AP hide caption

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President Obama speaks in the White House's Brady Briefing Room on Tuesday. Behind the president, a ticking clock counts down the time until taxes will go up if Congress can't reach an extension deal on payroll tax cuts. Haraz N. Ghanbari/AP hide caption

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