Final answer:
A sole executive agreement is not likely to be in effect longer than a treaty.
Step-by-step explanation:
The statement 'A sole executive agreement is likely to be in effect longer than is a treaty.' is false.
A sole executive agreement is an agreement between the President of the United States and a foreign country that does not require Senate approval. While executive agreements can be in effect for a long time, they are generally not as permanent or binding as treaties, which require Senate ratification. Treaties are considered more formal and have a higher level of legal authority.