GOP nominee Donald Trump is experiencing an eye-popping surge in support among black Americans in Florida – the biggest prize of all the battleground states – according to a new poll. Trump has attracted the backing of a full 20 percent of black Americans in Florida, a poll by Florida Atlantic University and the Economics Polling Initiative found. The survey, conducted Aug. 19-22 and released Wednesday, shows Democrat Hillary Clinton winning the support of 68 percent of Florida’s black voters. Trump took an overall lead in the state, 43 to 41 percent, within the poll’s 2.7 percent margin of error....