...Unlike other recent Republican presidential nominees, Donald Trump is making young men a central focus of his campaign. If effective, his effort could peel enough away from the Democratic Party to transform the country’s electoral math for years to come. Recent data from the Harvard Youth Poll ... for the Harvard Kennedy School Institute of Politics, reveals ... the share of young men identifying as registered Democrats has dropped by seven percentage points, while those identifying as Republicans have increased by seven points — a net shift of 14 points in just four years. Young women, during the same period,...