If the union's deal with the city is that stuff as the mandate must be negotiated then the union president would
have to be seen as standing up for that. It's difficult to say as we don't know much of the back scene stuff.
Based on what's happened elsewhere we could expect the court to come down on the city's side.
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”