> Why didn't Obama appoint someone from the green party?
Because aside from the law governing appointments, there is also the Senate confirmation process, and such a violation of both the spirit of the law and the established informal norms would both be unlikely to survive that process, and complicate other matters before the Senate, which was blocking more routine nominees.
Because aside from the law governing appointments, there is also the Senate confirmation process, and such a violation of both the spirit of the law and the established informal norms would both be unlikely to survive that process, and complicate other matters before the Senate, which was blocking more routine nominees.