the United States is constitutional?

Yes, the United States is a constitutional country, meaning it has a system of government that is defined and limited by a constitution. The Constitution of the United States, which was written in 1787 and took effect in 1789, provides the framework for federal governance and embodies the principles of federalism, divides power between the federal government and the states, and delineates the separation of powers among the three branches of federal government: the legislative (Congress), the executive (headed by the President), and the judicial (the federal court system).

The U.S. Constitution also establishes a system of checks and balances among these branches to prevent any one branch from gaining too much power. Additionally, the Constitution includes the Bill of Rights, which consists of the first ten amendments that guarantee fundamental rights and liberties to individuals, including freedom of speech, freedom of religion, and the right to a fair trial, among others.