 But the vast importance of the trust and the operation of treaties as laws, i.e. the importance of these things and the fact that they operate as laws, plead strongly for the participation of the whole or a portion of the legislative body in the office of making them. So the idea is the president would negotiate and make them, but he needed the consent of another branch. In the case of what they finally fell on was this two-thirds consent by one branch, the Senate.