Give her credit: Ann Coulter is a woman of strong convictions. Those convictions may be wrongheaded, bizarre, and even bigoted, but she knows what she believes and is willing to hold Donald Trump accountable. Unless he builds the wall (and not just some candy-ass fence) she's done with him—ready to turn on him with the white hot bitterness of the true believer who suddenly awakes to betrayal.
It's easy to mock Coulter, who wrote a book titled In Trump We Trust, for ever thinking she could trust Trump (and I will probably go on doing so), but at least something mattered to her. Unlike the cultists for whom Trump can do no wrong, and who will not hold him to any of his promises as long as he fights the right enemies, Coulter's politics have a very clear standard. "We have been betrayed over and over and over with presidents promising to do something about immigration," she explained to the New York Times's Frank Bruni. "If he played us for suckers, oh, you will not see rage like you have seen."
Trump does seem worried. After a few days pretending that he hadn't really been rolled on the border wall (Congress allocated only $1.6 billion of the $25 billion he had requested in the budget passed last month), Trump has ramped up his anti-immigrant rhetoric, killed the deal to regularize the status of so-called "dreamers," lashed out at Mexico, and authorized sending the National Guard to patrol the border.