Most of the treaties submitted to the Senate have received approval from the Council and the Senate for ratification. In the first 200 years, the Senate approved more than 1,500 treaties and rejected only 21. Some of them, including the Treaty of Versailles, were rejected twice. Most of the time, the Senate simply did not vote on treaties that its leaders did not have sufficient support in the Senate to approve, and in general, those treaties were eventually withdrawn. At least 85 treaties were eventually withdrawn because the Senate had never taken final action. Contracts can also remain with the Senate Foreign Relations Committee for an extended period of time, as treaties do not have to be reservient at the start of each new Congress. There have been cases where contracts within the committee have been dormant for years, if not decades, without any action being taken. With the fall of France in June 1940, President Roosevelt concluded two executive treaties whose overall effect was to transform the role of the United States from strict neutrality vis-à-vis the European war into a role of covetousness of the half-war. The first agreement was with Canada and provided for the creation of a Permanent Joint Defence Council which, “in a broader sense, would consider defending the northern half of the Western Hemisphere.” 482 Second, and more important than the first, there was the Hull-Lothian Agreement of 2 September 1940, under which the United States, in exchange for leasing certain sites for naval bases in the British West Atlantic, for ninety-nine years, handed over to the British Government fifty obsolete destroyers, which had been overhauled and recommissioned.483 And on 9 September. In April 1941, given the recent completion of the German occupation of Denmark, the State Department entered into an executive agreement with the Danish minister in Washington, under which the United States was given the right to occupy Greenland for defense purposes.484 The Constitution is silent on how contracts could be terminated. The violation of two treaties under Jimmy Carter`s administration sparked controversy. In 1978, the president terminated the U.S. Defense Treaty with Taiwan to facilitate the establishment of diplomatic relations with the People`s Republic of China.

Also in 1978, the new Panama Canal Treaties replaced three previous treaties with Panama. In one case, the president acted unilaterally; in the second, it terminated the treaties in accordance with the measures taken by Congress. .