Which of the following is NOT a constitutional qualification for the office of President?

The correct answer is that being "at least 30 years old" is NOT a constitutional qualification for the office of President. The U.S. Constitution explicitly states in Article II, Section 1, that a person must be at least 35 years old to be eligible for the presidency.

The other qualifications listed in the question are indeed constitutional requirements. The Constitution mandates that a president must be a natural-born citizen, which ensures that the individual has strong ties to the country and its interests. Additionally, the requirement to be a resident of the U.S. for at least 14 years helps to ensure that the candidate has an intimate understanding of the nation’s culture and politics, which is important for effective governance. Therefore, while age is a qualifying factor, the specific threshold for presidential eligibility is 35 years, making the assertion regarding 30 years incorrect in this context.