Age and Citizenship requirements - US Constitution, Article II, Section 1
- No person except a natural born citizen, or a citizen of the United States, at the time of the adoption of this Constitution,
shall be eligible to the office of President; neither shall any person be eligible to that office
who shall not have attained to the age of thirty-five years, and been fourteen years a resident
within the United States.
Term limit amendment - US Constitution, Amendment XXII, Section 1 - ratified February 27, 1951
- No person shall be elected to the office of the President more than twice, and no person who has
held the office of President, or acted as President, for more than two years of a term to which some
other person was elected President shall be elected to the office of the President more than once.
Oath Requirement - US Constitution, Article II, Section 1
- Before he enter on the execution of his office, he shall take the following oath or affirmation: "I do solemnly swear (or affirm) that I will faithfully execute the office of President of the United States, and will to the best of my ability, preserve, protect, and defend the Constitution of the United States."