Vought, a bookish technocrat with an encyclopedic knowledge of the inner workings of the U.S. government, cuts an unusual figure in Trump’s inner circle of Fox News hosts and right-wing influencers. He speaks in a flat, nasally monotone and, with his tortoiseshell glasses, standard-issue blue suits, and corona of close-cropped hair, most resembles what he claims to despise: a federal bureaucrat. The Office of Management and Budget, like Vought himself, is little known outside the Beltway and poorly understood even among political insiders. What it lacks in cachet, however, it makes up for in the vast influence it wields across the government. Samuel Bagenstos, an O.M.B. general counsel during the Biden Administration, told me, “Every goddam thing in the executive branch goes through O.M.B.”