"Even if it wasn't unconstitutional it was still wrong. Bill Clinton getting a blowjob wasn't unconstitutional, but that still got him impeached."

Was it even wrong?

The city was gathering information on a large event that was planned intentionally to exlude the involvement of local government... There could be potential safety or legal issues therefore involved.

On the other hand, if the Mayor was using the police to infiltrate the meetings of a political opponent to somehow sabotage them, that'd be rather different.

Intent is what's being discussed....