Which one is not the feature of the Presidential form of government of U.S.A. ?

The presidential form of government in the United States is founded on the constitutional separation of powers rather than the fusion of executive and legislative powers, which is the defining hallmark of a parliamentary system such as that of the United Kingdom. In the United States, the President serves as head of state and government, is elected through an Electoral College, and serves a fixed four-year term independent of congressional confidence.