Ernest Hemingway once said that courage was “grace under pressure.” Two presidential candidates, Donald Trump and Bernie Sanders, have recently tested this proposition. And how each man responded revealed the type of person he is and the type of president he would make: Trump authored his own doom, and Sanders opened immense new possibilities as a compassionate person and serious candidate for president.

Here’s where it went fatally wrong for Trump. During the GOP debate on Fox, when Megyn Kelly famously queried him about his attitude toward women (whom he has called “fat pigs,” “dogs,” “slobs” and “animals”) he hit back by threatening the questioner: “I’ve been very nice to you, although I could probably maybe not be, based on the way you have treated me. But I wouldn’t do that.”

Bad enough to alienate women in this way, but there’s even more insidious political crime here: attacking the First Amendment’s protection of a free press by menacing journalists. “I wouldn’t do that,” he said coyly. If you wouldn’t do it, why bring up that you could? For no other reason than to stifle other journalists who might want to ask tough but reasonable questions. If Americans learned that a leader in another country was threatening reporters, we would be outraged. Yet here it is. Right here. Right now.