Most executive agreements were made on the basis of a treaty or an act of Congress. However, presidents have sometimes entered into executive agreements to achieve goals that would not have 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 granted the United Kingdom 50 overflow destroyers in exchange for 99 years of leases for some British naval bases in the Atlantic. The U.S. Constitution does not explicitly give a 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 power to manage foreign relations granted to it. Despite the question of the constitutionality of executive agreements, the Supreme Court ruled in 1937 that they have the same force as treaties. As executive agreements are concluded on the authority of the President-in-Office, they do not necessarily bind his successors. The Case Zablocki Act of 1972 requires the president to inform the Senate of any executive agreement within 60 days. The powers of the President to enter into such agreements have not been granted.
The notification requirement allowed Congress to vote in favor of cancelling an executive agreement or to refuse to fund its implementation.   Executive agreements are often used to circumvent the requirements of national constitutions for the ratification of treaties. Many nations, which are republics with written constitutions, have constitutional requirements for ratifying treaties. The Organization for Security and Cooperation in Europe is based on executive agreements. The Supreme Court of the United States, in united states v. Pink (1942), considered that international executive agreements that have been concluded in force have the same legal status as treaties and do not require the approval of the Senate. In Reid v. Covert (1957), while reaffirming the President`s ability to enter into executive agreements, he decided that such agreements could not be contrary to federal law or the Constitution in force. The use of executive contracts increased significantly after 1939. Before 1940, the U.S. Senate had ratified 800 treaties and presidents had concluded 1200 executive agreements; From 1940 to 1989, during World War II and the Cold War, presidents signed nearly 800 treaties, but negotiated more than 13,000 executive agreements. An executive agreement is an agreement between the heads of government of two or more nations that has not been ratified by the legislature when treaties are ratified.
Executive agreements are considered politically binding in order to distinguish them from legally binding treaties. In the United States, executive agreements are binding internationally when negotiated and concluded under the authority of the president on foreign policy, commander-in-chief of the armed forces, or a previous act of Congress. For example, the president, as commander-in-chief, negotiates and enters into status of forces agreements (SOFAs) governing the treatment and disposition of U.S. armed forces stationed in other nations. However, the President may not unilaterally conclude executive agreements on matters not within his constitutional authority. In such cases, an agreement should take the form of an agreement between Congress and the executive or a contract with deliberation and approval by the Senate.  In the United States, executive agreements are concluded exclusively by the President of the United States. They are one of three mechanisms through which the United States make binding international commitments. . .