… Republican presidential candidates typically perform poorly among black voters, perhaps the most loyal constituency in the Democratic Party. …
But as demonstrated in the past two White House races — in which John McCain received 4 percent of black votes in 2008 and Mitt Romney received 6 percent in 2012 — when a Republican collapses into single digits among African-Americans and struggles with other minorities, it reduces the number of white votes a Democrat needs to win the presidency.
That is what worries Republicans this year, particularly in states such as Ohio and Pennsylvania with heavily black cities, where an NBC News/Wall Street Journal/Marist poll last week showed Mr. Trump receiving only 1 percent of the black vote. CONT.
Jonathan Martin & Yamiche Alcindor, New York Times