On March 1, 1974, a grand jury in Washington, D. C., indicted several former aides of President Nixon, who became known as the " Watergate Seven ": Haldeman, Ehrlichman, Mitchell, Charles Colson, Gordon C. Strachan, Robert Mardian and Kenneth Parkinson, for conspiring to hinder the Watergate investigation.

At UCLA, he met John Ehrlichman, who would become a close friend and colleague in the Nixon administration.

In 1978, he co-authored The Ends of Power with Joseph Di Mona, in which he took responsibility for fostering the atmosphere in which Watergate flourished, a stark contrast from Ehrlichman, who never forgave Nixon for not pardoning him.

* Nixon is heard on the tapes telling Ehrlichman in April 1973 that he should hint to Dean to stay on the reservation because in the end the only man who can grant Dean clemency and save his ability to practice law is the president.

* 1978 – Former United States President Nixon aide John D. Ehrlichman is released from an Arizona prison after serving 18 months for Watergate-related crimes.

* 1975 – Watergate scandal: Former United States Attorney General John N. Mitchell and former White House aides H. R. Haldeman and John Ehrlichman are sentenced to prison.

* February 21 – Watergate scandal: Former United States Attorney General John N. Mitchell, and former White House aides H. R. Haldeman and John Ehrlichman, are sentenced to between 30 months and 8 years in prison.

On April 30, Nixon asked for the resignation of H. R. Haldeman and John Ehrlichman, two of his most influential aides, both of whom were indicted, convicted and ultimately sentenced to prison.

Writing from prison for New West and New York Magazine in 1977, Ehrlichman claimed Nixon had offered him a large sum of money, which he declined.

Ehrlichman entered prison in 1976, followed by the other two in 1977.

Unlike his co-defendants, Ehrlichman voluntarily entered prison before his appeals were exhausted.

Following his release from prison, Ehrlichman held a number of jobs, first for a quality control firm, then writer, artist and commentator.

The scandal would eventually lead to the resignation of President Nixon as well as prison terms for White House Chief of Staff H. R. Haldeman, G. Gordon Liddy, Egil Krogh, White House Counsel Charles Colson and John Dean, and presidential adviser John Ehrlichman.

Ehrlichman was convicted of conspiracy, obstruction of justice, perjury and other charges ; he served 18 months in prison.

* John D. Ehrlichman, Counsel and Assistant to the President for Domestic Affairs

* John Ehrlichman, counsel and Assistant to the President for Domestic Affairs under Richard Nixon

He and Ehrlichman were called " the Berlin Wall " by other White House staffers in a play on their German family names and shared penchant for keeping others away from Nixon and serving as his " gatekeepers.

Nixon to Haldeman, heard on tapes ordered released for the trial of H. R. Haldeman | Haldeman, John Ehrlichman | Ehrlichman and John N. Mitchell | Mitchell: " I don't give a shit what happens.

John Daniel Ehrlichman ( March 20, 1925 – February 14, 1999 ) was counsel and Assistant to the President for Domestic Affairs under President Richard Nixon.

After the start of the Watergate investigations in 1972, Ehrlichman lobbied for an intentional delay in the embattled confirmation of L. Patrick Gray as Director of the F. B. I.

White House Counsel John Dean cited the " Berlin Wall " of Ehrlichman and Haldeman as one of the reasons for his growing sense of alienation in the White House.

Ehrlichman wrote several novels, including The Company, which served as the basis for the 1977 television miniseries Washington: Behind Closed Doors.

The completed but never broadcasted documentary, along with associated papers and videotape elements ( including an interview Ehrlichman did with Bob Woodward as part of the project ) are housed at the Richard B. Russell Library for Political Research and Studies, at the University of Georgia in Athens.

After learning from Ehrlichman that John Dean was cooperating with the U. S. attorney and would be revealing to him what happened on June 21, Gray told his staunchest congressional supporter, Senator Lowell Weicker, so that he might be prepared for that revelation.

In a 1997 interview with Tom Clancy for the video Eye of the Storm, John Ehrlichman stated Strachan " knows a lot, that he's not telling.

When Nixon was elected, he entered government, working as an assistant to John Ehrlichman and in 1974 became assistant to the president for domestic affairs.

:" I just can't get through to Ehrlichman ," ( referring to John D. Ehrlichman, the president's chief aide for domestic matters.

He then worked for the administration of U. S. President Richard Nixon, serving as assistant to John Ehrlichman from 1972 to 1973.

* February 14 – John Ehrlichman, American Watergate scandal figure ( b. 1925 )

** Watergate scandal: John N. Mitchell, H. R. Haldeman and John Ehrlichman are found guilty of the Watergate cover-up.

The book chronicles the investigative reporting of Woodward and Bernstein from Woodward's initial report on the Watergate break-in through the resignations of H. R. Haldeman and John Ehrlichman, and the revelation of the Nixon tapes by Alexander Butterfield in 1973.

* The Company ( 1976 ) by John Ehrlichman, a fictionalized account of Nixon administration involvement in events leading to the Watergate scandal.

Ehrlichman created " The Plumbers ", the group at the center of the Watergate scandal, and appointed his assistant Egil Krogh to oversee its covert operations, focusing on stopping leaks of confidential information after the release of The Pentagon Papers in 1971.

Shortly before his death, Ehrlichman teamed with best-selling novelist Tom Clancy to write, produce, and co-host a three-hour Watergate documentary, John Ehrlichman: In the Eye of the Storm.

* Modified limited hangout, a phrase Ehrlichman used in the Watergate tapes

* John Ehrlichman ( 1951 ), infamous figure in the Watergate scandal

Haldeman and John Ehrlichman, Dean sensed he was going to become the Watergate scapegoat and despite going to Camp David, he returned to Washington without having completed his report.

He spent his days in the offices of the Watergate Special Prosecutor Jaworski, and testifying in the trial of Watergate conspirators Mitchell, Haldeman, Ehrlichman, Robert Mardian, and Kenneth Parkinson, which concluded on January 1, 1975.

In April 1973 in the growing midst of the Watergate scandal, there was a major reshuffling of Nixon administration posts, due to the resignations of White House Chief of Staff H. R. Haldeman and Domestic Affairs Advisor John Ehrlichman.

* John Ehrlichman, ( 1925-1999 ), assistant to U. S. President Richard Nixon, convicted in Watergate scandal

* Harper's Magazine engaged Wyeth as a court artist for the Watergate hearings and trials that included U. S. Senate and the Supreme Court proceedings regarding the impeachment of President Richard Nixon, including the tense courtroom scenes in Judge John J. Sirica's trial of John Ehrlichman, G. Gordon Liddy, and other Watergate defendants.