[DiogenesLamp]

I don’t think he has that power. We own the base by treaty. The President cannot singlehandedly abrogate a treaty.

[BunnySlippers]

Here’s how he does it:

http://www.huffingtonpost.com/joseph-v-micallef/could-barack-obama-give-t_b_9334352.html

Says that the US had no authority to the 1934 treaty and signs an executive order withdrawing from the treaty.
Gives Gitmo back to Cuba.

And IIRC, I believe Castro said there would be no easing of relations unless the USA agreed to give it back. And we know there has been an easing.

[Jimmy Valentine]

The treaty was for 100 years and expired in the 1990s.