Final answer:
The amendment that set a maximum of two terms for the President of the United States is the 22nd Amendment. Ratified in 1951, it imposes a constitutional limit on presidential power, allowing no president to be elected more than twice.
Step-by-step explanation:
22nd Amendment Sets Presidential Term Limits:
The amendment that set a maximum of two terms for the President of the United States is the 22nd Amendment. Ratified in 1951, this amendment was enacted in response to President Franklin D. Roosevelt's four terms in office, which prompted a shift in political power and a reevaluation of executive term limits. The 22nd Amendment stipulates that no president is allowed to be elected more than twice, and it also covers scenarios where a person who takes over the presidency and serves more than two years of another president's term is then limited to one additional election to the presidency.
Historically, the unwritten custom of serving only two terms was set by the nation's first president, George Washington. The 22nd Amendment transformed this unwritten custom into a formal constitutional requirement, ensuring that no president could dominate the political landscape for an extended period as Roosevelt had. Despite various legislative proposals, attempts to repeal the 22nd Amendment have not been successful, thus maintaining the two-term presidential limit.