FILE - In this Sept. 6, 2012 file photo, President Barack Obama and his family and Vice President Joe Biden and his family celebrate their nominations as the confetti falls at the concl

 

              FILE - In this Sept. 6, 2012 file photo, President Barack Obama and his family and Vice President Joe Biden and his family celebrate their nominations as the confetti falls at the concl
FILE - In this Sept. 6, 2012 file photo, President Barack Obama and his family and Vice President Joe Biden and his family celebrate their nominations as the confetti falls at the conclusion of the Democratic National Convention in Charlotte, N.C. Republican National Convention in Tampa, Fla. Message to convention planners: Three days are enough. Both major parties packed their presidential nominating conventions into 72 hours, one day short of the traditional four-day celebration _ prompting few complaints from either delegates or the viewing public. (AP Photo/Carolyn Kaster, File)