Donald Trump may have been handed a major boost in the lead up to the US presidential election with a demographic potentially set for a dramatic shift in voting behaviour, according to a top pollster. James Johnson from JL Partners joined Jacob Rees-Mogg to look ahead to this year’s vote which he believes could see Hispanics, a demographic that has traditionally backed the Democrats, start to turn to the Republicans. He told GBN America that the border crisis is the ‘number one issue’ for voters and Hispanics are among those concerned. “In the opinion polls, the border is the number one issue …