I take it, then, that Marbury v. Madison is a dead letter going forward

Chief Justice Roberts: ‘In Every Case We Must Respect the Role of the Legislature, and Take Care Not to Undo What It Has Done’

O RLY? I’m pretty sure his job is to decide the constitutionality of the laws passed by Congress. The Supreme Court’s decisions in King v. Burwell and NFIB v. Sebelius constitute dereliction of duty for refusing to vacate blatantly unconstitutional laws.