Final answer:
Republican President Richard Nixon was involved in the Watergate scandal, which emerged after a break-in at the Democratic National Committee headquarters in 1972. Nixon's involvement and cover-up efforts led to his resignation in 1974.
Step-by-step explanation:
The president involved in the Watergate scandal was Republican President Richard Nixon. This scandal came to public attention following the arrest of five men for breaking into the Democratic National Committee headquarters at the Watergate office complex in June 1972. Following relentless journalistic investigation by Washington Post reporters and a Senate inquiry, it was revealed that Nixon had approved the break-in and consequently engaged in a cover-up. The investigation also disclosed that Nixon had recorded conversations in the Oval Office, which ultimately linked him to the conspiracy to obstruct justice. The intensity of the scandal led to Nixon's resignation in 1974, making him the first U.S. president to resign from office. His resignation was a direct result of attempting to cover up the actions of the burglars who were linked to his reelection campaign committee.