The Watergate Scandal was a major political scandal that occurred in the United States in the early 1970s. It involved the break-in of the Democratic National Committee headquarters at the Watergate office complex in Washington, D.C., and the subsequent cover-up of the incident by the Nixon administration.

The main objective of the United States government in the Iran-Contra Affair was to secure the release of American hostages who were being held in Iran. The Reagan administration secretly sold arms to Iran in exchange for the release of the hostages, and the proceeds from the arms sales were then diverted to support the Contras, a rebel group fighting against the Nicaraguan government.

The primary allegation against President Bill Clinton in the Monica Lewinsky scandal was that he committed perjury by lying under oath about his sexual relationship with Monica Lewinsky, a White House intern. Clinton was impeached by the House of Representatives but acquitted by the Senate.

The Watergate Scandal also involved the illegal use of campaign funds by President Richard Nixon's re-election committee. The committee broke into the Democratic National Committee headquarters at the Watergate office complex in order to steal documents and plant bugs.

The primary accusation against Secretary of the Interior Albert Fall in the Teapot Dome Scandal was that he accepted bribes from oil companies in exchange for favorable treatment in the leasing of government oil reserves at Teapot Dome, Wyoming.

The main allegation against President Donald Trump in the Ukraine scandal was that he abused his power by pressuring Ukraine to investigate his political rivals in exchange for military aid.

The primary evidence used against President Bill Clinton in the Clinton-Lewinsky scandal was Monica Lewinsky's testimony before a grand jury. Lewinsky testified that she had a sexual relationship with Clinton and provided detailed accounts of their encounters.

The primary allegation against President Richard Nixon in the Watergate Scandal was that he obstructed justice by attempting to cover up the break-in of the Democratic National Committee headquarters at the Watergate office complex.

Oliver North was a National Security Advisor in the Reagan administration and played a key role in the Iran-Contra Affair. He was responsible for coordinating the secret arms sales to Iran and the diversion of the proceeds to the Contras.

The primary allegation against President Bill Clinton in the Whitewater scandal was that he and his wife, Hillary Clinton, were involved in real estate fraud while he was governor of Arkansas.

Edwin Denby was the Secretary of the Navy in the Harding administration and played a key role in the Teapot Dome Scandal. He approved the oil leases that were at the center of the scandal.

The primary allegation against President Donald Trump in the Russia investigation was that he colluded with Russia to interfere in the 2016 presidential election.

Kenneth Starr was appointed as an Independent Counsel to investigate the Clinton-Lewinsky scandal. He led the investigation and ultimately issued a report that concluded that Clinton had committed perjury and obstructed justice.

In the Checkers speech, President Richard Nixon addressed allegations that he had misused campaign funds. He denied the allegations and claimed that the only gift he had received was a cocker spaniel named Checkers.

Senator Thomas J. Walsh was a key figure in the investigation of the Teapot Dome Scandal. He led the Senate committee that investigated the scandal and uncovered evidence of wrongdoing by Secretary of the Interior Albert Fall.