US Democratic presidential candidates Hillary Clinton (R) and Bernie Sanders participate in the MSNBC Democratic Candidates Debate at the University of New Hampshire in Durham on February 4, 2016. 
Clinton and Sanders face off on February 4, in the first debate since their bruising Iowa clash that the former secretary of state won by a hair, as they gear for a battle royale in New Hampshire. / AFP / Jewel Samad        (Photo credit should read JEWEL SAMAD/AFP/Getty Images)