After the Supreme Court struck down efforts by Congress to veto actions taken by the executive branch, Mr. Levitas, a Democrat from Georgia, proposed that the White House and Congress convene a "conference on power-sharing" to codify the duties of each branch of government.

Asked to comment on the congressman's proposal, Mr. Roberts mocked the idea, and him. "There already has, of course, been a 'Conference on Power Sharing,' " Mr. Roberts wrote in a memo to Mr. Fielding. "It took place in Philadelphia's Constitution Hall in 1787, and someone should tell Levitas about it and the 'report' it issued."

"It really should not matter what the personal ideology of our appointees may be, so long as they recognize that their ideology should have no role in the decisional process."