1.) The statement that best expresses the purpose of the opening words of the US Constitution, "We the people" is political sovereignty stems from the consent of the people.
2.) The best example of a check on presidential power is Congress overriding a presidential veto
3.) The U.S. Constitution has seven articles: One each for the three branches of government, one about how the states relate to each other and to the federal government, one describing then amendment process, one establishing the constitution as the supreme law of the land, and one describing how it would be ratified
4.) The Founding Fathers included the Bill of Rights with the Constitution to protect the rights of individuals from the Federal Government.
5.) It would be separation of powers because only Congress has the authority to make laws.