What if the US government expressed its readiness to negotiate about the CEU (as advocated for by Mr Szijjartó), but only on condition that the Hungarian representative be appointed by the Hungarian King?
That would be as meaningful as Szijjártó expecting them to negotiate an issue for which they do not have constitutional competence.
Well, there is a division of powers and competences within the US. That is incomprehensible for the Foreign Minister of a country where power is monolith, but the holder of it is not (yet) a king