No one yet knows the details of the Iran deal that President Trump has been teasing on social media for the past day or so. The president himself has admonished his followers not to “listen to the losers, who are critical about something they know nothing about.” But as this war stumbles to a close, it is clear that the president, too, is lost: He didn’t know what he was doing when he began it, and now he doesn’t know how to get out of it. Only a day ago, Trump was trying to project confidence.