Politics in the city
No countries have ever tried to claim the city. Whether or not the world leaders know about the city's existence is still a mystery. The city was fundamentally lawless; until the day self-proclaimed Mayor Jess took over the city by military force two years ago. No one knew her origin, or why she would want to take over a city like this; but everyone knows she is not mayor material - she is a nutjob.
Hum think the city like a post-apocalyptic world with random people trying to conquer the city, and there is minimal ways to contact the outer world.
Edit: and thanks xD