Would this guy be of any value to the US? I mean he’s not a humanitarian case - he’s after all a ChiCom who fell foul with his boss. I’d feel different if the guy was a Human Rights campaigner or a case of economic or religious persecution.
In this case, I have a feeling that the US had little to gain from taking the guy in and a lot to lose, especially if Bo does end up in the CCP Standing Committee. This way, the moderate GuangDong guy’s camp gets a one up against Bo’s more hardline group in the power intrigues within the CCP.