Answer:
hope this helps :)
Step-by-step explanation:
Nixon: the Watergate scandal and was the first president to visit communist China.
Carter: Lost reelection bid to Ronald Reagan and oversaw the Camp David Accords.
Reagan: stated the quote "Mr. Gorbachev , tear down this wall." and the Iran-Contra affair occurred during Reagan's second term.
Clinton: Impeached by congress and he signed NAFTA into law.