The one about the Mississippi judge

Seymour Hersh in the London Review of Books:

Hovering outside was a habit of [vice president]Bush's. Zbigniew Brzezinski, who had been Carter's national Security adviser, told me he had been invited to brief the president early in his first term on the Soviet threat. When he had finished his summary, he said, he asked Reagan if he had any questions. 

Reagan responded: "Do you know the one about the newly elected black judge in Mississippi?" Brzezinski said no. Reagan explained that the judge, after being told by his clerk that the case involved a charge of rape, said: "Well then bring in the fuckee and the fucker." That was it. 

Brzezinski was ushered out of the Oval Office and found Bush waiting outside, eager to learn of Reagan's response to the briefing. "I said he told me a joke," Brzezinski recalled. The vice president replied: "Oh no. Not the one about the Mississippi judge."

See also Anti-Americanism, Alternet, and Seymour Hersh.