Final answer:
John Jay believed that the Articles of Confederation needed changes to establish the principle of federalism, which allocates power between the national and state governments for a balanced governance.
Step-by-step explanation:
John Jay was one of the leaders who believed that the Articles of Confederation required significant changes to create a strong federal government. Jay, along with other leaders like George Washington, Alexander Hamilton, and James Madison, advocated for an entirely new outline of government that would rectify the weaknesses of the Articles. The changes they sought were aimed at establishing a federalism approach within the new Constitution. Federalism is a system of government in which power is divided between a national government and various state governments. This principle ensures that there is a balance of power and that both levels of government perform duties essential to the governance of the country. It aligns with the notion that the central government should have enough power to be effective while states retain significant authority over local matters.