Doonesbury by Garry Trudeau for August 11, 1973
Aid: Excuse me, sir, Mr. Ehrlichman is on the line. He'd like you... Nixon: Tell him to call back later! John Dean: Now, Mr. President, as I was saying... Nixon: No, John, no! Executive clemency is just not possible! Now, please - I'm very busy! Dean: But sir, you gave it to Jimmy Hoffa... Nixon: That was different! Aid: Excuse me, sir - there's someone here from the Jeb Magruder legal defense fund. Nixon: OUT! OUT! Everyone out!