What is the maximum number of years a person can serve as President?

The correct answer is rooted in the 22nd Amendment to the U.S. Constitution, which was ratified in 1951. This amendment establishes that no person can be elected to the office of President more than twice, totaling a maximum of two four-year terms, which amounts to 8 years in total. However, a person who has succeeded to the presidency (for example, if they were the vice president and the president resigned or died) can serve up to a maximum of 10 years. This scenario accounts for the possibility of completing more than one term while still adhering to the limitation of two elected terms. Therefore, the maximum number of years a person can effectively serve as President is 10, reflecting the combination of completing the remainder of a term and being elected for two additional terms.