The very hardest thing about being president is that almost all of the choices you get to make are no-win, impossible decisions. Let civilians keep getting slaughtered in Syria? Or commit U.S. forces without being sure who they are fighting for and how they might “win”? Propose a “compromise” measure—on health insurance, gun control, taxes, a Supreme Court nominee, whatever—in hopes that you’ll win over some of the opposition? Or assume from the start that the opposition will oppose, and begin by asking for more than you can get? Choices that are easier or more obvious get made by someone else before they are anywhere close to the president’s desk.

These decisions are hardest when life-and-death stakes are high and time is short. In 2003, invade Iraq, or wait? In 2011, authorize the raid on bin Laden, or not? In 1962, when to confront the Soviets over their missiles in Cuba, and when to look for the possibility of compromise.

The more I’ve learned about politics and the presidency, the more I’ve been sobered by the combination of temperamental stability and intellectual rigor these decisions demand. Stability, not to be panicked or rushed or provoked. Rigor, to understand what more you need to know, but also to recognize when you must make a choice even with less information than you would like.

This is an issue I’ve discussed before, in installments #26 and #129 and several more. I keep coming back to it because it’s so important, and because this crucial measure is one on which Donald Trump keeps demonstrating that he is flagrantly unfit. What’s hardest for any president would be simply impossible for him, as he reminds us yet again today.

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Almost immediately on hearing news that a GOP office in North Carolina had been firebombed, Trump put out the tweet you see above. Meanwhile the Charlotte Observer, a real newspaper close to the scene with actual reporters, quoted police this way:

Hillsborough police said somebody threw a bottle of flammable liquid through the window of Orange County’s GOP headquarters, setting supplies and furniture ablaze.

Somebody, from people concerned with facts and evidence. Animals representing Hillary Clinton and Dems, from the man asking to be put in charge of the countless judgment calls a president makes each day. This was the same judge-and-jury, rush-to-judgment thinking style that Trump displayed years ago with the “Central Park Five.”

This man demonstrates each day that he has reflexes rather than judgment and would be dangerous in any responsible role. And the supposedly “responsible” leadership of his party, to their shame, continues to say: Put him in command!

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Styles of thought aren’t necessarily inherited. But in this case …