Question

If executive agreements are similar to treaties, and they do not have to be approved by the Senate, why does the president still negotiate treaties?

Answer 1

The Constitution provides that the president "shall have Power, by and with the Advice and Consent of the Senate, to make Treaties, provided two-thirds of the Senators present concur" (Article II, section 2). ... The Senate does not ratify treaties—the Senate approves or rejects a resolution of ratification.