Which of the following is a requirement for a Constitutional Convention to be called?

A Constitutional Convention can be called when two-thirds of the state legislatures request it. This provision is found in Article V of the U.S. Constitution and demonstrates the role of the states in the amendment process. The framers included this option to allow states to play a significant role in proposing amendments, particularly when there is widespread consensus among them that certain changes are necessary. This mechanism reflects the federal nature of the American political system, where both the national and state governments have defined powers and responsibilities.

In contrast, the President does not have any authority to approve or call a Constitutional Convention. Additionally, a simple majority in both houses of Congress is related to the amendment process but does not pertain to the calling of a convention. Lastly, the Supreme Court does not initiate proposals for a Constitutional Convention; its role is judicial rather than legislative or procedural in nature. Therefore, the requirement for two-thirds of states to request a Constitutional Convention underscores the importance of state participation in the constitutional amendment process.