Has the US ever been divided into city states?

While the U.S. has never officially been divided into city-states like those found in ancient Greece, there have been historical instances of cities wielding significant autonomy and influence, resembling city-states. For example, during the late 19th and early 20th centuries, cities like New York and Chicago operated with considerable political and economic power, sometimes overshadowing state governments. Additionally, proposals for secession or greater autonomy have emerged in various regions, but none have led to a formal city-state system. Overall, the U.S. remains a federal system with defined state boundaries.