Is GITMO The Last Resort?
THE REAL PANIC COMES IN THE FORM OF A LAST RESORT.
A U.S. official, said Guantanamo is the "option of last resort." The official, speaking on condition of anonymity, said the U.S. has identified about 50 people among the more than 900 held by Syrian forces as "high value" suspects that could be transported to Guantanamo if they are not repatriated.
https://www.militarytimes.com/flashpoints/2019/02/08/guantanamo-prison-looms-as-option-for-detained-isis-fighters-as-us-withdraws-from-syria/
Transfer to Guantánamo has been a theoretical last resort; no new captive has arrived there since 2008, when the Supreme Court ruled that prisoners there have a constitutional right to file habeas corpus lawsuits challenging the basis for their detention.
https://www.nytimes.com/2018/05/02/us/politics/guantanamo-detainee-transferred-trump-al-darbi.html