Which of the following is NOT a voting qualification in the United States?

In the context of voting qualifications in the United States, being a U.S. citizen, being at least 18 years old, and meeting state residency requirements are all fundamental criteria established by federal law and supported by Supreme Court rulings. U.S. citizenship ensures that individuals have a legal right to participate in the democratic process, as voting is a right granted to citizens. The minimum age of 18 is mandated by the 26th Amendment to the Constitution, allowing younger citizens to engage in elections. Additionally, residency requirements are enforced by states to ensure that voters have a tangible connection to the community in which they are voting, which helps maintain the integrity of elections.

On the other hand, having a valid driver's license is not a universal voting requirement. While many states do require some form of identification to vote, a driver's license is not the only acceptable form and is not mandated by federal law. States may provide alternative means of identification, and some states even allow individuals to vote without any ID. Thus, while a driver's license may be a common form of ID used in voting, it is not a qualification for voting itself, making this option the correct answer to the question.