Because they were the only ones who were able to appoint for the position and that treaties are only given to the powers of Congress
us senate
it is the supreme authority of senate to ratify treaties with foreign nations by a majority of vote.
The Legislative Branch can ratify treaties; The Senate approves Presidential Appointments
US Senate
The Senate.
The Constitution of the United States gives the power to make treaties to the President. However, the Senate needs to consent to any treaties by a 2/3 majority vote.
Because the Senate must ratify treaties with a super majority.
The Congress
Legislative
The Senate has not abused it power to review treaties and confirm nominations. This power was granted in the Constitution.
That body is the United States Senate. Treaty ratification takes a super majority vote of 2/3.
The Senate.