Former President Donald Trump and his supporters are dramatically overselling the extent to which they have improved their numbers with Black voters, a long solidly Democratic bloc of the electorate, wrote Philip Bump in an analysis for the Washington Post on Monday. Trump held a campaign stop at a Black church in Detroit, widely touted by MAGA supporters, where the attendees of the event turned out to be almost exclusively white, Bump wrote. “The style of Donald Trump and of Trump supporters is to always present his support as mind-boggling and exceptional, and so this support was,” Bump wrot…