In recent weeks, Trumpian excesses have—finally—provoked some visible setbacks: These include his firing of Homeland Security Secretary Kristi Noem; the scaling back of the grandiose “regime-change” goal of his Iran war; and the grudging acquiescence, at least purported, in repeated judicial rejections of unlawful planks of his policy and political agendas. Liberals must not merely keep their guard up. They must ratchet up their pushback game. Too often, this has been an erratic, flick-of-the-