There has been no surge in registration among white voters since 2012, and the white voters who have joined the electorate are younger and likelier to support Mrs. Clinton than those who were already registered. Perhaps most surprising, the missing white voters who skipped the 2012 election have turned out to be far less supportive of Mr. Trump than those who voted in 2012. The possibility that the missing white voters were conservative populists, primed to support a candidate like Mr. Trump, was never supported by much evidence. |