Although the governors of American States have great power, why can't they call themselves presidents?

The United States can be said to be the most powerful country in the world where we live today, and there is no one. In America, their leaders are called presidents and heads of government. Because the president of the United States is also the supreme commander in the army, in the eyes of most of us, the president of the United States is the most powerful person on earth, but in fact, in our real life, the power of the president of the United States is not as great as I thought, and in peacetime, governors and presidents of many American States often compete.

Let me give you an example. When Obama was still in office, he issued a very strict gun ban, which was opposed by the then governor of Texas. We may not know this, but after the current President Trump took office, he revised the immigration policy of the United States, which was also opposed by many state governors. In fact, this kind of behavior seems unreasonable, which is determined by the American system.

The situation in the United States is very different from that in China. In the United States, it is a system of separation of powers, while in China, it is centralized. But the separation of powers in the United States is to ensure the checks and balances between the legislative power and various powers in the United States. In fact, it does not give the governor the right to challenge his own president, but this situation is caused by the federalism of the United States.

However, the governors of American States dare not call themselves presidents, because the biggest leader is the president, and the governor is the governor level, just like in our country, the chairman is the chairman and the governor is the governor. Although the relationship between the president and the governor of the United States is not hierarchical, it is still managed by the president in the United States.