Most executive agreements were entered into under a treaty or an act of Congress. Sometimes, however, presidents have entered into executive agreements to achieve goals that would not receive the support of two-thirds of the Senate. For example, after the outbreak of World War II, but before the United States entered the conflict, President Franklin D. Roosevelt negotiated an executive agreement that gave the United Kingdom 50 overflow destroyers in exchange for 99-year leases for some British naval bases in the Atlantic. The Case Zablocki Act of 1972 requires the president to notify the Senate of any executive agreement within 60 days. The Powers of the President to conclude such agreements have not been divided. The notification requirement allowed Congress to vote to cancel an executive agreement or refuse to fund its implementation.   The U.S. Constitution does not explicitly give the president the power to enter into executive agreements. However, it may be authorized to do so by Congress, or it may do so on the basis of the authority conferred on it to conduct foreign relations.
Despite the question of the constitutionality of executive agreements, the Supreme Court ruled in 1937 that they had the same power as treaties. Since executive agreements are concluded under the authority of the outgoing president, they do not necessarily bind his successors. Executive agreements – that is, international agreements concluded between heads of state or their representatives, usually without the approval of Parliament – are not explicitly allowed anywhere in the Constitution. The Constitution is silent on international agreements unless it gives the President, in cooperation with the Senate, the power to conclude and conclude treaties. Nevertheless, the long-established principle is that the ability of the United States to negotiate and conclude international agreements is not exhausted by the force of the treaty. This principle has been recognized several times since the beginning of the Republic in the very conduct of the foreign policy of the United States. .