The Compromise of 1790 was a compromise between Alexander Hamilton and Thomas Jefferson with James Madison where Hamilton won the decision for the national government to take over and pay the state debts, and Jefferson and Madison obtained the national capital (District of Columbia) for the South. The compromise resolved the deadlock in Congress. Southerners were blocking the assumption of state debts by the treasury, thereby destroying the Hamiltonian program for building a fiscally strong federal government. Northerners rejected the proposal, much desired by Virginians, to locate the permanent national capital on the Virginia-Maryland border.
The meeting was organized by Thomas Jefferson, and only he, James Madison, and Alexander Hamilton were present at the meeting. This led to many assumptions about what was discussed at the meeting. The mystery of what happened at the meeting was popularized due to the musical Hamilton with the song The Room Where It Happens
The compromise made possible the passage of the Residence and Funding (Assumption) Acts in July and August 1790. According to historian Jacob Cooke, it is "generally regarded as one of the most important bargains in American history, ranking just below the better known Missouri Compromise and the Compromise of 1850."
Politicians at the federal and the state levels sought to break the legislative deadlock by unofficial negotiations. A number of clandestine meetings and political dinners were held in New York City, then serving as the nation's temporary capital, in the summer of 1790.
The "dinner table bargain" was a pivotal episode in the final stages of these compromise efforts. Based on an account given by former Secretary of State Thomas Jefferson, two years after the event, the "dinner" was a private meeting between Secretary of the Treasury Alexander Hamilton and U.S. House of Representatives member James Madison. Shortly after the Assumption Bill failed for a second time in June in the House, Hamilton, despairing that his financial plan would be scuttled, appealed to the newly-appointed Jefferson to apply his influence on the matter. According to Jefferson's account, he arranged the dinner for the two officials at his residence in New York City on or about June 20, 1790. The meeting produced a political settlement on the "assumption" and "residency" crisis.
Jefferson described the encounter between the men at his lodgings in New York City:
"It ended in Mr. Madison's acquiescence in a proposition that the question [i.e., assumption of state debts] should be again brought before the house by way of amendment from the Senate, that he would not vote for it, nor entirely withdraw his opposition, yet he would not be strenuous, but leave it to its fate. It was observed, I forget by which of them, that as the pill would be a bitter one to the Southern states, something should be done to soothe them; and the removal of the seat of government to the [Potomac] was a just measure, and would probably be a popular one with them, and would be a proper one to follow the assumption."
The key provision of Secretary Hamilton's First Report on the Public Credit won approval with the passage of the Assumption Act, establishing the foundation for public credit. The Residence Act resulted in the permanent U.S. capital being located in the agrarian states of Maryland and Virginia, the demographic center of the country at the time, rather than in a metropolitan and financial center such as New York City or Philadelphia. Jefferson and Madison secured a lucrative debt adjustment for their state of Virginia from Hamilton, as part of the bargain.
Historian Max M. Edling explained how assumption worked. It was the critical issue; the location of the capital was a bargaining ploy. Hamilton proposed that the federal Treasury take over and pay off the debt states had incurred to pay for the American Revolutionary War. The Treasury would issue bonds that rich people would buy, thereby giving the rich a tangible stake in the success of the national government. Hamilton proposed to pay off the new bonds with revenue from a new tariff on imports. Jefferson originally approved the scheme, but Madison had turned him around by arguing that federal control of debt would consolidate too much power in the national government.
Edling pointed out that after its passage in 1790, the assumption was accepted. Madison tried to pay speculators below 100%, but they were paid the face value of the state debts they held regardless of how little they had paid for them. When Jefferson became president, he continued the system. The credit of the U.S. was solidly established at home and abroad, and Hamilton was successful in signing up many of the bondholders in his new Federalist Party. Good credit allowed Jefferson's Treasury Secretary, Albert Gallatin, to borrow in Europe to finance the Louisiana Purchase in 1803, as well as to borrow to finance the War of 1812.