 The source of it, Justice Thomas, I think is, as you described in your separate opinion in Zivotofsky, for example, that the executive vesting clause does not include only executive powers laid out explicitly therein, but encompasses all the powers that were originally understood to be included therein. And Marbury against Madison itself provides strong evidence of this kind of immunity, a broad principle of immunity that protects the president's official acts. Attorney for former President Trump, D. John Sauer.