Trump campaign manager Manafort quits after troubled stretch

Donald Trump's U.S. presidential campaign sealed a major staff reshuffle with the resignation on Friday of its campaign chairman and the Republican nominee tried to end weeks of upheaval to focus on beating Democratic rival Hillary Clinton. The departure of Paul Manafort came as Trump tried this week to reset his unorthodox bid for the White House after falling behind Clinton in opinion polls for the Nov. 8 election. Trump said in a statement he had accepted Manafort's resignation but did not of