Obama wants congress to pass a law that would enforce the UN treaty. WTF? Wouldn't this fall under the heading of Ex Post Facto?
No, treaties are law on the same footing as statutes already, IF they were properly signed and ratified, on which I don't believe there is any dispute as far as the Vienna Protocol goes, which is at the root of this legally, not the ICJ request. Texas did fail to follow the Vienna Protocol, but the question in our legal system is whether that amounts to error
per se, or whether it will be analyzed on a 'Harmful error' basis. In the latter case he is probably still toast, since the right under the Protocol is mainly a right to contact the home country's consulate, and does not give the foreign government any rights to intervene in the trial.