I think if people really knew about how the Bush/Cheney administration co-opted the judiciary in order to keep terrorist from every leaving Gitmo no matter what the evidence proved or disproved, they'd be very surprised.
Closing Gitmo will continue to be difficult as long as this country is at war because of the purposeful legal rangling the previous administration did. Most of the men held in Gitmo will never receive a trial (let alone a fair one) because the rules have been set in such a way that none will likely ever see the evidence held against them because most of it has been labelled as "classified". As such, the Supreme Court upheld a ruling that detainees nor their defense attorney's are able to see classified evidence unless they have the proper security clearance. Moreover, even if the attorney's got the right clearance, the "classified" evidence that is suppose to convict these men can never be presented at trial for reasons of "national security". So, unless the SC overturns that ruling, any White House administration/DOJ who tries to hold trial against a Gitmo detainee has a steep uphill battle on his hands.
And if that wasn't bad enough, you have the issue of the rules for military tribunels being established by civilian trial counsels who've never dealt with "war crimes" issues instead of allowing the JAG court to write the procedures. The Bush/Cheney administration never intended to release the detainees or allow them a fair trial, not while the War on Terror was ongoing and certainly not while they were in office.
Again, if people really knew the truth where Gitmo is concerned, they'd think differently as to why Pres. Obama is having such a difficult time closing it down. Frankly, I think he's stuck on this issue until the war in Afghanistan ends. And by then it may be someone else's problem and they'll have the same problem closing it let alone bringing any of the detainees to trial.
If people only knew...