Watergate Seven

The Watergate Seven has two meanings: (1) it refers to the five men caught June 17, 1972 burglarizing the Democratic National Committee’s headquarters in the Watergate Hotel and their two handlers, E. Howard Hunt and G. Gordon Liddy (two Nixon campaign aides), all of whom were tried before Judge John Sirica in January 1973; (2) it refers to the seven advisors and aides to United States President Richard M. Nixon who were indicted by a grand jury on March 1, 1974 for their role in the Watergate scandal. The grand jury also named Nixon an unindicted conspirator. The indictments marked the first time in U.S. history that a president was so named.

The period leading up to the trial of the first Watergate Seven began on January 8, 1973. The term "Watergate Seven" was coined a few months later, in April 1973, by American lawyer, politician, and political commentator Ed Koch, who, in response to U.S. Senator Lowell P. Weicker, Jr.'s indicating that one of the men in Watergate bugging case had been ordered in the spring of 1972 to keep certain Senators and Representatives under surveillance, posted a sign on the door of his United States Congress office saying, 'These premises were surveilled by the Watergate Seven. Watch yourself'.

The seven advisors and aides later indicted in 1974 were:

Nixon revealed much later that he would not grant amnesty to the Watergate Seven because, if he did so, Nixon would have been pressured to provide amnesty for Vietnam draft dodgers and this would have gratified his liberal elite opponents.

...
Wikipedia