Because I never saw anyone refer to this amendment:
(h/t Bob Cesca) On June 6th, House Republicans have added an amendment to the National Defense Authorization Act (NDAA) to prevent transferring detainees from Guantanamo Bay:
None of the amounts authorized to be available to the Department of Defense may be used to transfer, release, or assist in the transfer or release, during the period beginning on the date of enactment of this Act and ending on December 31, 2014, any individual detained at Guantanamo (as such term is defined in section 1033(f)(2)) to the custody or control of the Republic of Yemen or any entity within Yemen.
The reason Yemen was chosen is that the DOD has cleared 56 prisoners to be transferred to Yemen. A total of 86 of the 166 detainees have been cleared for transfer.
I doubt this will make it through the Senate, especially considering how many Democrats in the House voted against it, but you never know. But, for now at least, we know which party refuses to let Obama fix the wrong that is Gitmo.