“Big data” could play a huge role in the 2016 US election, even if Donald Trump doesn’t think so. Trump, who sailed through the Republican primaries using unconventional campaign rallies and Twitter messages, has indicated that he sees little use for popular data analytics tools to help target specific voters. But analysts say he may be at a disadvantage in the general election if he stays on that course. “In the primaries, he was only looking for Republican voters, and in the general he needs all voters,” said Alan Rosenblatt, a digital political strategist...