Answer:
Yes, the executive agreement by the President is valid
Step-by-step explanation:
An executive agreement is an agreement between the United States (made by the current president) and a foreign government that has the same force as treaties but that is less formal, does not necessarily bind the president's successor and does not need to be ratified by two-thirds of the U.S. Senate in order to become valid like treaties require.
This presidential power is not specifically stated in the U.S. Constitution, however, the president is authorized to have it as one of their powers in the area of foreign affairs. Therefore, the executive agreement that the President made with the foreign leader is completely valid.