Sen. Daniel K. Inouye (D-Hawaii) is shown Aug. 1, 1973 in Washington before the Sen. Watergate committee. (AP Photo)

Sen. Herman H. Talmadge, D-Ga., questions former personal attorney for President Nixon, Herbert Kalmbach, left, during Senate Watergate hearings in Washington on July 30 1973. (AP Photo)

Sen. Herman H. Talmadge, D-Ga., listens to the testimony of H.R. Haldeman, former White House aide, during Senate Watergate Committee hearings in Washington D.C. on July 30, 1973. (AP Photo)

Senate Watergate Chairman Sam Ervin, D-N.C.,left talks with attorneys Charles M. Schaffer and Robert C. McCandless and former White House aide John Dean III about top secret documents during a break of the Watergate hearings Tuesday, June 26,1973 in Washington. (AP Photo).

Sen. Daniel Inouye (D-Hawaii), left, questions former White House chief domestic aide John Ehrlichman during Senate Watergate Committee hearing, July 26, 1973 in Washington. After the questioning, Inouye muttered softly to himself,

Archibald Cox, special prosecutor, talks with newsmen outside of U.S. District Court Thursday July 26, 1973 in Washington after Judge John J. Sirica said he would rule whether President Nixon will have to release White House tapes and other documents to Cox and the Senate Watergate Committee. (AP Photo/

John D. Ehrlichman, former aide to U.S. President is shown in this July 24, 1973 photo, as he speaks before the senate Watergate committee. (AP Photo)

Sen. Daniel K. Inouye (D-Hawaii) listens to a reply to his question of John D. Erlichman, former assistant to Pres. Nixon, in testimony before the Senate Watergate committee, July 25, 1973 in Washington. (AP Photo)

John D. Ehrlichman is shown in this July 24, 1973 photo speaking before the senate Watergate committee in Washington, DC. (AP Photo)

Chairman Sam Ervin, (D-N.C)., announces the decision by the Senate Watergate Committee to subpoena White House tapes and documents related to the Watergate affair Monday, July 23,1973 on Capitol Hill. (AP Photo).

Fred Thompson, minority counsel, laughs during a session of the Senate Watergate Committee in Capitol Hill, July 23, 1973. Gordon Strachan, a former White House aide, had just told the committee that his advice to persons thinking of working for the government was to

Sen. Daniel K. Inouye (D-Hawaii) questions former Nixon campaign official Fred LaRue before the Senate Watergate committee, July 19, 1973 in Washington. (AP Photo)

G. Gordon Liddy, one of the seven convicted Watergate conspirators, arrives at the House Armed Services Subcomittee in Washington DC on July 20, 1973 to testify. (AP Photo/stf)

With his hand supporting his head, former Attorney General John Mitchell responds to questions from chief counsel Sam Dash in his third day of testimony before the Senate Watergate Committee July 12, 1973 in Washington. (AP Photo)

Sen. Fred Thompson, left, minority counsel for the Senate Watergate Committee; Sen. Howard Baker, Jr., R-Tenn., center; and Rufus Edmisten, rear, deputy counsel, puff on their pipes while listening to testimony in the Senate Caucus Room on Capitol Hill, July 14, 1973. (AP Photo)

Sen. Daniel K. Inouye (D-Hawaii) listens to the testimony of former Atty. Gen. John N. Mitchell during the Sen. Watergate committee hearing, July 12, 1973 in Washington. (AP Photo)

Sen. Fred Thompson, center, smokes a pipe as he listens to questions during the Senate Watergate Committee in Washington, July 11, 1973. Others are unidentified. (AP Photo)

Former Attorney General John N. Mitchell smokes a pipe as he listens to a question during his appearance before the Senate Watergate Committee in Washington, D.C., Tuesday, July 11, 1973. (AP Photo)

Senator Herman E. Talmadge, D-Ga., left, questions former Attorney General John Mitchell July 10, 1973 before the Senate Watergate Committee in Washington. (AP Photo)

Former Attorney General John Mitchell begins his testimony before the Senate Watergate Committee July 10, 1973 in Washington. (AP Photo)