President Donald Trump is almost certain to win reelection in 2020, according to a political science professor whose “Primary Model” has correctly predicted five out of six elections since 1996. “The Primary Model gives Trump a 91 percent chance of winning in November,” Stony Brook Professor Helmut Norpoth told Mediaite Tuesday. He noted that his model, which he introduced in 1996, would have correctly predicted the outcome of all but two presidential elections in the last 108 years: “This model gets it right for 25 of the 27 elections since 1912, when primaries were introduced.” The exceptions include John F....