April 3, 2013 8:52 am Biden, Clinton: Friends or Rivals in 2016 After seeing Hillary Clinton and Vice President Joe Biden at the Kennedy Center many are speculating about their political futures. NBC’s Tracie Potts reports. US & World Videos 1:36 Arizona Senate repeals 1864 abortion ban 1:40 Democrats say Big Oil misled public for decades about climate change 1:45 NYPD enters Columbia University in riot gear to clear protest 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look