Who is eligible to vote in federal elections?

The eligibility to vote in federal elections is primarily determined by the age requirement. According to the U.S. Constitution, individuals must be at least 18 years old to cast a ballot in federal elections. This requirement ensures that voters are adults, as they are expected to make informed decisions regarding their government and the policies that affect their lives.

While some states may have additional voter identification requirements, such as possessing a driver's license or having a social security number, these do not affect the basic eligibility criteria established at the federal level. Similarly, completion of high school is not a prerequisite for voting; rather, the focus is on age and citizenship. Thus, being at least 18 years old is the definitive requirement that enables citizens to participate in federal elections.