It would seem so far that this was an internal decision between the UK Govt, Scottish Govt and UK business interests. The UK did consult the US (GWB) when they set up the prisoner transfer agreement and did not get any objection from the US. In this case however the prisoner transfer agreement was not used as was advised by the US and he was let loose on compassionate grounds (provision in Scottish law if less than 3 months to live). We could argue the rights and wrongs of the decision all day long but to somehow drag President Obama into it as a willing accomplice into this saga is foolish and petty.