What Do John McCain, Barack Obama Need To Accomplish In Second Debate?

Obama leads in the polls heading into matchup, but McCain could get a boost from 'Palin factor.'By Gil Kaufman Senators John McCain and Barack Obama Photo: Getty Images With 28 days left to make their cases and the race still pretty tight, presidential candidates John McCain and Barack Obama have another chance Tuesday night (October 7) to get their licks in before a nationwide audience. The Senate colleagues will face each other and moderator Tom Brokaw on the stage at Nashville's Be...

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