An international agreement entered into by the President, outside of the treaty ratification process.
-it can be used to avoid the lengthy treaty-making process =)
A President can make an executive agreement at anytime with another foreign "Chief of State" (leader). However, the agreement is only honored as long as the US President who made it, is in office....
For Executive Empowerment.
The president can make a treaty if he gets an agreement from who?