Protesters in support of Senator Bernie Sanders, an independent from Vermont, demonstrate during a rally at Philadelphia City Hall before the start of the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Monday, July 25, 2016. The Democratic National Committee gloated as Republicans struggled to project unity during the party's national convention, but they are now facing a similar problem after their leader resigned on the eve of their own gathering. Photographer: Victor J. Blue/Bloomberg via Getty Images