They want to shut down Gitmo, unfortunately, they don’t have a workable plan.
Some have talked of Federal Prisons:
Geneva does not allow housing these detainees with ordinary felons.

Others have “floated” the idea of housing them on a ship:
Once again, Geneva says no can do, they must be on land.

Thus, for those detainees not sent back to the ME, or released, a replacement for Gitmo will have to be constructed on a site yet to be determined.

The 253 that remain have been determined to be the worst/most dangerous.
Yet of those released so far, a fair number have gone back to the battlefield.

Luckily, releasees now are required to sign a statement that they will not rejoin the fight.
….no joke.