Vice President Joe Biden speaks to supporters on Tuesday, Oct. 2, 2012 in Charlotte, N.C. at The Fillmore. Biden returned to Charlotte for his sixth visit to North Carolina this year. The visit comes a month before Election Day and a day after a new poll showed the presidential race deadlocked in North Carolina. (AP Photo/The Charlotte Observer, Jeff Siner)

Associated Press
Vice President Joe Biden speaks to supporters on Tuesday, Oct. 2, 2012 in Charlotte, N.C. at The Fillmore. Biden returned to Charlotte for his sixth visit to North Carolina this year. The visit comes a month before Election Day and a day after a new poll showed the presidential race deadlocked in North Carolina. (AP Photo/The Charlotte Observer, Jeff Siner)
Vice President Joe Biden speaks to supporters on Tuesday, Oct. 2, 2012 in Charlotte, N.C. at The Fillmore. Biden returned to Charlotte for his sixth visit to North Carolina this year. The visit comes a month before Election Day and a day after a new poll showed the presidential race deadlocked in North Carolina. (AP Photo/The Charlotte Observer, Jeff Siner)
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