When Trump thought protesters might triumph, he made them extravagant promises. After it became clear that they weren’t going to quickly overthrow the mullahs, he treated them as disposable allies. His offhand commentary casts doubt on their prospects—potentially demoralizing the very people he once claimed to champion—and he has dismissed alternatives such as Reza Pahlavi, the son of Iran’s deposed shah. By refusing to apologize for accidental strikes against civilians, he has bolstered the regime’s claim that the United States doesn’t really care what happens to the Iranian people.