WASHINGTON — It was in Nevada, just about month ago, when Donald Trump proclaimed his affection for the uneducated. “We won with young. We won with old. We won with highly educated. We won with poorly educated. I love the poorly educated,” the Republican presidential front-runner boasted after coasting to a decisive victory in the state’s caucuses. He should love them. Trump overwhelmingly leads his rivals for support among the less educated, and draws more modest backing from college graduates and those with postgraduate study, according to exit polls conducted for the Associated Press and television networks by Edison Research. In an analysis of voters by education in states where exit or entrance polling is available, nearly half of those with high school diplomas or less schooling said they supported the billionaire.