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.   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. Some authors consider executive agreements to be treaties under international law, as they bind both the United States and another sovereign state. However, under U.S. constitutional law, executive agreements are not considered treaties within the meaning of the contractual clause of the U.S. Constitution, which requires the Council and the approval of two-thirds of the Senate to be considered a treaty.
In the case of executive agreements, it seems generally accepted that if the president has independent power to enter into an executive agreement, the president can terminate the agreement independently, even without the consent of Congress or the Senate. 186 Thus, observers seem to agree that while the Constitution gives the president the power to enter into single executive agreements, the president can also unilaterally denounce those agreements.187 The same principle would apply to political commitments: to the extent that the president is empowered to make non-binding commitments without the consent of the Senate or Congress, the President may also unilaterally withdraw from these obligations. .188 The Bricker Amendment, approved by the Senate Justice Committee in June 1953, reaffirmed the primacy of the Constitution over treaties; the necessary implementing provisions "that would be valid without a contract" before a contract can be entered into in the United States; and gave Congress the power to oversee all executive agreements. Congressional efforts to curb the practice of executive agreements and stem the tide of unilateralism have been largely unsuccessful. The first and most important attempt came in 1951, when Senator John Bricker proposed an amendment to the Constitution to limit the use and impact of executive agreements and treaties in the United States. . . .