David Cay Johnston: 21 Questions For Donald Trump

I have covered Donald Trump off and on for 27 years — including breaking the story that in 1990, when he claimed to be worth $3 billion but could not pay interest on loans coming due, his bankers put his net worth at minus $295 million. And so I have closely watched what Trump does and what government documents reveal about his conduct.

Reporters, competing Republican candidates, and voters would learn a lot about Trump if they asked for complete answers to these 21 questions.