'Forty-Four years later, the Congress passed the Reciprocal Trade Agreement Act of 1934 granting the President the authority to enter into agreements with foreign nations, without the approval of Congress.'
More FDR BS. Executive agreements are BS. You know better.
The use of treaties for trade has been almost nonexistent after 1890 when the Congress gave the President authority to negotiate tariffs and suspend duty free tariffs. That decision was challenged and the Supreme Court of the United States (SCOTUS) upheld that Congress did not usurp their constitutional powers to the President. This decision would serve as the basis for legislation that would give and restrict the Presidents power over the years.
This later became known as the Congressional-Executive Act, which differentiated itself from a treaty which requires the 2/3 majority vote in the Senate. It is this Congressional-Executive Act that has been used for almost every American trade deal since the 1890s.