“There is a lot of inertia” against closing the prison, “and the administration is not putting a lot of energy behind their position that I can see,” said Senator Carl Levin, the Michigan Democrat who is chairman of the Senate Armed Services Committee and supports the Illinois plan. He added that “the odds are that it will still be open” by the next presidential inauguration.

And Senator Lindsey Graham, a South Carolina Republican who also supports shutting it, said the effort is “on life support and it’s unlikely to close any time soon.” He attributed the collapse to some fellow Republicans’ “demagoguery” and the administration’s poor planning and decision-making “paralysis.”…

Still, some senior officials say privately that the administration has done its part, including identifying the Illinois prison — an empty maximum-security center in Thomson, 150 miles west of Chicago — where the detainees could be held. They blame Congress for failing to execute that endgame.