Most eyes will be on the final showdown between President Barack Obama and challenger Mitt Romney on November 6. But what about the congressional races? Thanks to redistricting, zealous fundraising and on-camera gaffes, some candidates are now racing neck and neck. So what are the tightest races in California and across the country? And what does it mean for who controls Congress?

Marty Kady, congressional editor for Politico
Shira Toeplitz, political reporter for Roll Call
Jack Pitney, professor of government at Claremont McKenna College
Larry Gerston, professor in the department of political science at San Jose State University and author of "Not So Golden After All: The Rise and Fall of California"

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