There is no question that Donald Trump’s ambition in the first 100 days of his return to the Oval Office was to set a new standard for presidential accomplishment. To rival, even surpass, the scope of Franklin Roosevelt’s efforts nearly a century ago, when he moved so quickly — and so decisively — that he established the first 100 days as a yardstick for executive action. But as consequential as they have been, and as exhausting as they’ve felt to many Americans, these first months of Trump’...