system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The Watergate scandal and why it brought down a president.

As above, bear in mind I'm British.
gpt
There were offices in the Watergate complex in Washington DC.  One of those offices was used by the Democratic party in the 1972 election.  People working for people who worked for Nixon's Committee to Re-Elect the President (CREEP) broke into that office but were caught.

Subsequently there was a coverup to attempt to hide the link.  That coverup included improper suggestions from the President that the CIA interfere with the FBI's investigation.

In the end the House of Representatives Judicial Committee voted to send Articles of Impeachment against President Nixon to the full House for consideration.  The articles were based on abuses of power and interference with the legal system. They were virtually guaranteed to pass in the full House, and Nixon was informed that he did not have enough allies in the Senate to win the trial that would follow the articles being voted out of the House.  Rather than fight the trial and lose, Nixon elected to resign.