Explain why might the president make executive agreements rather than negotiate a formal treaty? in your answer include one con and one pro of an executive agreement.

Executive agreements are often preferred by the president since they do not need Senate agreement. Both parties can just agree to something which does not need a congressional input. One advantage with this kind of agreement is that it takes less time. If the president hands it over to the senate, it can never be done. However, It could also be an easy way to perform political concerns and targets for self-interest. 

A formal treaty is advantageous when it comes to duration. This could not easily be reversed and are binding even until the next presidents, but opposite to executive agreements, they do take time.