Madison believed the solution to America's problems was to be found in a strong central government. Congress needed compulsory taxation authority as well as power to regulate foreign and interstate commerce. To prevent state interference with the federal government's authority, Madison believed there needed to be a way to enforce the federal supremacy, such as an explicit right of Congress to use force against non-compliant states and the creation of a federal court system. Madison also believed the method of representation in Congress had to change. Since under Madison's plan, Congress would exercise authority over citizens directly—not simply through the states—representation ought to be apportioned by population, with more populous states having more votes in Congress.