Last year, I wrote several columns about Donald J. Trump’s record as a businessman. Far from mastering “The Art of the Deal” — the title of his 1987 best seller — Trump made real estate blunders that turned billions in potential profits into mere millions. His foray into Atlantic City brought him perilously close to personal bankruptcy. As for all of his claims about owning a sprawling business empire, what he actually runs these days is a licensing company that slaps the Trump name on everything from buildings to steaks to an education company that was sued by New York State in 2013 for “persistent fraudulent, illegal and deceptive conduct.