Donald Trump visited a black neighborhood in Philadelphia on Friday and a black church in Detroit on Saturday. And liberals went berserk. If he’d known Democrats were so fearful of GOP black outreach, perhaps Mr. Trump wouldn’t have waited until two months before Election Day to start campaigning in inner cities.

During a roundtable discussion with businessmen, elected officials and clergy in North Philadelphia, Mr. Trump listened to stories about violent crime and bad schools. Speaking before a congregation at the Great...