The current account deficit of the United States is more than six percent of its gross domestic product—an all-time high. And the rest of the world, including other G7 countries such as Japan and Germany, must collectively run current account surpluses to finance this deficit. How long can...

The United States provides a classic example of a bottom-up system of federalism. It was created in 1787 when representatives of the then 13 colonies convened to ratify a constitution under which both the central government and the states would be sovereign entities. Within certain...