Which president was forced to resign from office because of a scandal?

The president that was forced to resign from office because of a scandal was Richard Nixon, as a result of the Watergate scandal.

Explanation:

The Watergate scandal was a case of political espionage that led, in 1974, to the resignation of Richard Nixon, then President of the United States. The multi-faceted affair began in 1972 with the arrest, inside the Watergate building, of burglars at the Democratic Party offices in Washington. Investigations by journalists and a lengthy US Senate investigation would eventually uncover large-scale illegal practices within the presidential administration.  

Although the robbery seemed to have been led by former employees of the White House, the case did, at first, very little noise. In appearance, the FBI investigation did not go far. However, two Washington Post reporters, helped by a mysterious informant, published many revelations, particularly about the burglars' ties to the Presidency and the irregular funding of Richard Nixon's campaign. The latter was nevertheless comfortably re-elected in November 1972. The following year, the obstinacy of Judge John Sirica and the establishment of a senatorial commission of inquiry tightened more and more the grip around the President's staff. A series of revelations of cases of obstruction of justice and abuse of power led to indictments. The American public was more interested in the affair with the televising of Senate hearings on the Watergate. When the existence of a listening system in the White House was made public, a struggle between Nixon and the investigators about the restitution of the tapes of the recordings began. The involvement of the President was clarified. When Congress came to initiate the impeachment procedure, aimed at the dismissal of the president, Nixon decided to resign.

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