Republican presidential candidate Ben Carson on Sunday advocated for Puerto Rico to become the 51st state. 'When you stop and think about it Puerto Ricans have been Americans for a century or more already,' Carson said at a rally on the island for Ricky Rosselló, a gubernatorial candidate in Puerto Rico's New Progressive pro-statehood party. 'You've already paid your dues,' Carson told a cheering crowd. 'There have probably been more patriotic Puerto Ricans than any other state. Look at all the contributions that have been made to America.' Puerto Rico faces a debilitating $72 billion dollar debt, but Carson said...