The lower house is the House of Representatives and the upper house is the Senate. House of Representatives is based on population in each state and serves for 2 years, the Senate is chosen by legislatives to serve for 6 years. The House of Representatives has the power of impeachment, which is a process in which an official is accused of unlawful activity, the outcome of which may include the removal of that official from office and criminal or civil punishment. In this way the people have a say in the impeachment of an official.
Article two of the Amendment states the power of the President; the President is the Chief of Executive and Administrator of the nation. The way the President and Vice President are elected is by Electoral College meaning they are elected by vote. Though when the President dies or leaves office succession happens. When it comes to war the President is the commander-in-chief of armed forces and the Congress has power to declare war. Also, under the consent of the Senate, the President can appoint justices of Supreme Court, ambassadors, and other