During Donald Trump’s speech on Iran this week, he revealed too much. In a line that sounded partly ad-libbed, he declared that the Strait of Hormuz “will open up naturally. It will just open up naturally.” This should be read as a straight-up admission that Trump has no idea how to fix the colossal mess he’s made, and that he’s just washing his hands of it entirely. That’s utterly damning. Meanwhile, Politico reports that Republicans privately fear the speech did nothing to help them politicall...