Donald Trump is very proud that he knows how to run up a tab. He knows how to trick investors into pouring additional money into failing companies. He knows how stiff contractors on his building projects. He knows how to cheat his own charity. And he knows that when he’s far enough down a hole, he can threaten everyone else who worries about the ground caving in. “King of Debt” isn’t a sobriquet someone else is trying to hang around Trump’s neck.