The Democratic-Republican administration of President Thomas Jefferson used British banks to fund the Louisiana Purchase, reduced the American military budget, and partly dismantled the Hamiltonian Federalist financial program. However, the French West Indies no longer needed to use American ships to move their products to Europe. Although the terms of the Treaty did not favour his country, British Prime Minister Henry Addington skillfully used the interlude to rebuild British strength, so that when fighting renewed in spring 1803, the Royal Navy quickly gained control of the seas. However the isolationist foreign policy of the United States, which was hostile to both Britain and France, and strongly opposed by the Federalist minority in Congress, came under heavy pressure from all sides.