Separation of the three powers is a political theory, which advocates clearly defining the administrative, legislative and judicial powers of the government to avoid abuse of power. The idea of separation of powers originates from the three parts of God in the Bible, namely, the Son, the Father and the Holy Spirit. The origin of the separation of powers can be traced back to Aristotle's time. Aristotle put forward the famous theory of three elements of government. For the first time, he divided state power into deliberation power, administrative power and judicial power, and thought that governing the country was based on whether the three powers were reconciled. On the basis of the three elements of the political system, Polybius in ancient Rome proposed that the three elements should cooperate and restrict each other. /kloc-In the 7th century, the famous British thinker John Locke published On the Government, which marked the initial formation of the theory of decentralization in the modern sense. Locke described the theory of decentralization in detail in On Government. He divided state power into legislative power, executive power and external power. Legislative power and administrative power should be exercised by different state organs, while administrative power and external power should be exercised by one organ. Legislative power belongs to parliament, executive power belongs to the king, and external power involves peace and war, diplomacy and alliance, and is also exercised by the king. After Locke, Montesquieu, a French enlightenment thinker, further developed the theory of separation of powers and put forward the famous theory of separation of powers. In On the Spirit of Law, he divided the state power into three types: legislative power, administrative power and judicial power. The so-called separation of the three powers is to hand over the three powers to three different state organs through legal provisions in order to maintain their respective powers and balance each other. Montesquieu's thought had a great influence on American framers. The US Constitution stipulates that Congress can impeach the president, but only a few presidents have been impeached since the founding of the United States more than 200 years ago. 1868, the US Senate rejected the impeachment of President andrew johnson by only one vote. 1974, President Nixon voluntarily announced his resignation because of the Watergate incident, but he was not impeached.