There is no equivalent of a Chief Minister in the United States of America. The United States is a federal republic, and each state has its own government. The head of government in each state is the governor. The governor is the equivalent of a Chief Minister in other federal systems, such as Australia and Canada. The United States Constitution does not give the federal government much power over the states. The states are sovereign and have a great deal of autonomy. The federal government can only intervene in state affairs if the Constitution expressly allows it to do so. This is why there is no equivalent of a Chief Minister in the United States.
The states are very different from each other, and they have different systems of government. Some states have a unicameral legislature, while others have a bicameral legislature. The states also have different executive structures. In some states, the governor is elected by the legislature, while in others, the governor is elected by the people.
The states also have different judicial systems. The federal judiciary is Supreme Court, but the states have their own courts as well. The states have more power than the federal government, and this is why there is no equivalent of a Chief Minister in the United States.