For 10 points, name this event which began with the attempted firing of Archibald Cox by Richard Nixon, a notable part of the Watergate Scandal.
An act passed as a direct result of this event was upheld in the case Morrison v Olsen. The person who ended this event claimed in a memoir that he was promised a Supreme Court seat in exchange for his cooperation. This event happened after its main target declined an offer to have a Democrat from Mississippi arbitrate on pieces of evidence. The target of this event was offered the Stennis Compromise by its instigator. During this event, William Ruckelshaus and Elliot Richardson resigned before Robert Bork finally fired the special prosecutor. For 10 points, name this event which began with the attempted firing of Archibald Cox by Richard Nixon, a notable part of the Watergate Scandal.
An act passed as a direct result of this event was upheld in the case Morrison v Olsen.
Saturday Night Massacre (Prompt on "Watergate" or anything similar)