Vice President Joe Biden and his wife Jill Biden arrive in Charlotte, N.C., Tuesday, Sept. 4, 2012, to attend the Democratic National Convention. (AP Photo/Gerry Broome)

 

              Vice President Joe Biden and his wife Jill Biden arrive in Charlotte, N.C., Tuesday, Sept. 4, 2012, to attend the Democratic National Convention. (AP Photo/Gerry Broome)
Vice President Joe Biden and his wife Jill Biden arrive in Charlotte, N.C., Tuesday, Sept. 4, 2012, to attend the Democratic National Convention. (AP Photo/Gerry Broome)