Amar, Akhil; Katyal, Neal (1995). «Executive Privileges and Immunities: The Nixon and Clinton Cases». Harvard Law Review(en inglés)108: 701, 702, 717. «The Constitution nowhere explicitly describes what litigation immunity, if any, the President merits by dint of his unique constitutional role; Nixon recognized presidential immunity in the absence of an express congressional statute to the contrary.» (citando Nixon contra Fitzgerald, 457 U.S. 731, 748 & n. 27 .)