Who can only run for federal office in the United States?

Only United States citizens are eligible to run for federal office in the United States, which is why this answer is correct. The requirement for candidacy ensures that individuals representing the public at a federal level have a stake in the country’s governance and are subject to its laws. This citizenship requirement reflects the principle that only those who are part of the nation should have the authority to make decisions impacting all its citizens.

Individuals over the age of 18 can participate in elections, but this age requirement alone does not qualify someone to run for office without being a citizen. Likewise, residency in a state is a requirement for many roles, but it does not confer eligibility for federal office unless accompanied by citizenship. Finally, there is no educational requirement, such as possessing a high school diploma, that impacts one's eligibility to run for federal office.