In October, 1973, Nixon ordered Richardson to fire the Watergate Special Prosecutor Archibald Cox; Richardson refused this order and resigned. At that point, William Ruckelshaus, the Deputy Attorney General was asked to carry out the order, and he refused and resigned as well. The third in command, Robert Bork, carried out this order. The events are generally referred to as the Saturday Night Massacre.
Richardson is the only individual to date to serve as head of four Cabinet Departments in the US Government — Health, Education and Welfare; Defense; Justice; and Commerce.
Just prior to the resignation of Vice-President Spiro Agnew, Richardson was portrayed as a cartoon figure with Agnew and Nixon on the cover of TIME magazine dated October 8, 1973. Agnew was quoted as saying: "I am innocent of the charges against me. I will not resign if indicted!"
As of 2006, Richardson is the only individual to serve in four Cabinet-level positions within the United States Government: Secretary of Health, Education, and Welfare from 1970 to 1973, Secretary of Defense from January to May of 1973, Attorney General from May 24 to October 1973, and Secretary of Commerce from 1976 to 1977.
Richardson then served as U.S. Attorney for Massachusetts from 1959 to 1961, and was later elected the Lieutenant Governor of Massachusetts and Attorney General of Massachusetts.
On December 31, 1999, Richardson died of a cerebral hemorrhage in Boston, Massachusetts at the age of 79.