One of the biggest objections to the Iran Nuclear Deal is that it violated U.S. law because it was never approved by two-thirds of the Senate, as required by the “Treaty Clause” (Art. II, Sec. 2) of the U.S. Constitution. (Contrary to the beliefs of many red-blooded Americans, the Constitution gives ratified treaties the same force as domestic law, per the Supremacy Clause.) However, this reflects a fundamental misunderstanding of the deal, the Constitution, and international law.
First, the deal was never binding: It is classified as a “nonbinding political commitment”, which, by definition, and in contrast to a treaty, requires no congressional approval nor is legally binding. Throughout U.S. history, presidents of all parties have made international agreements without the approval of a supermajority of Senators, either through “congressional-executive agreements”—which are ratified by only a simple majority of Congress—or through “executive agreements”, which are made solely by the president without any congressional involvement.
Between 1946 and 1999 alone, the U.S. completed nearly 16,000 international agreements—of which only 912 (5.7 percent) were treaties ratified by the Senate. (Most were congressional-executive agreements.)
While the Constitution does not explicitly provide for these alternatives, these alternatives have long been considered legitimate. Thomas Jefferson, a globalist sellout if we ever saw one, argued that the Treaty Clause procedure is not always necessary; short-term agreements without Senate approval may be better since “when they become too inconvenient, [they] can be dropped at the will of either party”. Most of the Founders did not objective this, because they recognized pragmatic and expedient reasons to allow the president to make international agreements without going through the long and politicized channels of the legislature.
In fact, when Jefferson sought to purchase the massive Louisiana Territory from France, there was some debate as to whether expanding U.S. territory was legal, since the Constitution was silent on the matter. He ultimately prevailed on the argument—backed by the “Father of the Constitution” James Madison—that the executive’s broad foreign policy powers allowed him to acquire the territory through treaty; he subsequently signed an agreement with France in April, announced it publicly in July, and finally got it ratified by the Senate in October.
The Supreme Court has repeatedly affirmed these powers. In Missouri v. Holland, it held that the federal government can use treaties to legislate in areas that would otherwise fall within the exclusive authority of the states. That is because the Supremacy Clause of the Constitution gives treaties the same force as federal law, which is binding on the states. In American Insurance Association v. Garamendi, the Court reaffirmed that “the President has authority to make ‘executive agreements’ with other countries, requiring no ratification by the Senate or approval by Congress, this power having been exercised since the early years of the Republic.”