Your assertion seems very narrow, to me. Obviously, he can close the darn thing whenever he wants to. The question is, what happens to the people inside? Congress has made it impossible for them to be brought to the US for trial, and has mandated they can only be held in military detentions. So the only other options are to keep Guantanamo open, or release them all and close it. Spine has nothing to do with the discussion, common sense and rational thinking does. Of course he isn't going to release them, so he has to except that ignorant, uninformed people are going to call him a liar, regardless of fact on the issue.
Clearly, what is right and wrong is irrelevant to you in this case.
Most of these people have done NOTHING wrong. Almost all of them have never been convicted of anything.
The only reason most of them are still in Gitmo is because their host countries will not take them back.
Were I POTUS, I would immediately order the military or CIA or whomever to find a country that will take most of them - even if that country has to be bribed to do so.
Once I found such a country, I would ask the inmates in question whether they wanted to stay in Gitmo or go to this country. Obviously they would take freedom.
Then I would give them each a few million and transport them to that country.
The rest that there is evidence that they are guilty of terrorism, I would order the military to immediately start trials on them - whatever the evidence available is.
If they are convicted, then start there incarceration.
If they are found innocent, the same deal as how the others are treated.
And I don't give a crap what spineless politicians in Congress want.
Were I Obama, I would stand up and tell them to get off their asses, grow backbones and figure out what to do with these innocent (mostly) people.
And I would keep on them, day after day, until they did.
But no, not Obama.
He makes some stupid promise to win votes, got power and now just ignores the plight of these (mostly) poor individuals and hopes the media will ignore it.
He could do a TON more to facilitate their release. But he instead does nothing.
And his ignorant supporters claim it's not his fault.
Pathetic...just like I think Obama is as a POTUS.
You do what is right and then worry about the consequences - not the other way around.
And if that does not sit well with cowardly Congressmen/Senators (or honor-blind Obama supporters)...so much the better.
If the only way America can survive is to do cowardly acts - then let it die.
And btw - I am neither Dem nor Rep.