RTAA`s innovative approach freed Roosevelt and Congress from breaking this trend of tariff increases. It has linked U.S. tariff reductions to reciprocal tariff reductions with international partners. It also allowed Congress to approve tariffs by a simple majority, unlike the two-thirds majority needed for other contracts. In addition, the President had the power to negotiate the terms. The three innovations in trade policy have created the political will and feasibility of a more liberal trade policy.  From then on, during the rounds and negotiations on the free trade area at the GATT (later the WTO), the President was granted the negotiating powers of non-tariff measures in the respective legislation, such as the Trade Act of 1974, but the power to reduce tariffs in general was similar to that of the RTAA. Between 1934 and 1945, the United States signed 32 reciprocal trade agreements with 27 countries.  In addition, the conclusion of the General Agreement on Tariffs and Trade was taken by the Authority under the RTAA. When U.S.
tariffs fell dramatically, global markets were also increasingly liberalized. Global trade has undergone a rapid transformation. The RTAA was a U.S. law, but it provided the first widely used system of guidelines for bilateral trade agreements. The United States and European nations began to avoid beggar neighborhood policies that pursued national trade objectives at the expense of other nations. Instead, countries have begun to realize the benefits of trade cooperation. Although the world has changed dramatically since the FDR passed the Mutual Trade Agreements Act, the basic trade promise remains the same. Well done, trade policy gives American workers the chance to compete in a level playing field, and under the TPA, Congress and the government unite to manage trade with global partners by setting goals and standards that defend American interests and values. The Reciprocal Tariff Act (adopted on 12 June 1934, Chapter 474, 48 Stat. 943, 19 U.C No. 1351) provided for the negotiation of customs agreements between the United States and various nations, including Latin American countries.
 The law served as an institutional reform to allow the president to negotiate with foreign nations a reduction in tariffs in exchange for a reciprocal reduction in U.S. tariffs. This has led to a reduction in tariffs. Democrats voted much more in favor of trade liberalization than Republicans, but were not consistent in their preferences. Mp Henry Rainey (D-IL) and members of Roosevelt`s government, Rexford Tugwell, Raymond Moley and Adolf Berle, were skeptical of tariff reductions during the Depression. However, the government decided to use a Democratic-controlled congress and presidency to impose the RTAA. In 1936 and 1940, the Republican Party ran on a platform to lift tariff reductions guaranteed under the RTAA. But when they reclaimed Congress in 1946, they did not act to remove tariffs. In the years since the adoption of the RTAA in 1934, the economies of Europe and East Asia had been decimated by the violence of World War II, which left a huge global production gap filled by American exporters.  During the war, the United States had the highest positive balance in its history. Republican preferences for tariffs began to shift as exporters in the home districts began to benefit from stronger international trade.
In the 1950s, there was no statistically significant difference between Republicans and Democrats on customs policy, a change that has lasted ever since.  Under the leadership of the United States and the United Kingdom, international cooperation flourished and concrete institutions were created.