2. Limited Government – Since the people give government its power, government itself is limited to the power given to it by them. In other words, the US government does not derive its power from itself. It must follow its own laws and it can only act using powers given to it by the people.

3. Separation of Powers – As stated previously, the US Government is divided into three branches so that no one branch has all the power. Each branch has its own purpose: to make the laws, execute the laws, and interpret the laws.

4. Checks and Balances – In order to further protect the citizens, the constitution set up a system of checks and balances. Basically, each branch of government has a certain number of checks it can use to ensure the other branches do not become too powerful. For example, the president can veto legislation, the Supreme Court can declare acts of Congress unconstitutional, and the Senate must approve treaties and presidential appointments.

5. Judicial Review – This is a power that allows the Supreme Court to decide whether acts and laws are unconstitutional. This was established with Marbury v. Madison in 1803.

6. Federalism – One of the most complicated foundations of the US is the principle of federalism. This is the idea that the central government does not control all the power in the nation. States also have powers reserved to them. This division of powers does overlap and sometimes leads to problems such as what happened with the response to Hurricane Katrina between the state and federal governmen

RE:
6 basic principles the constitution is built upon? help me here plz?

The 18th amendment best reflects popular sovereignty. Popular sovereignty means that the power is with the people. In the days when the amendment was passed, prohibition was huge. A moralist movement was sweeping through and the people wanted to ban alcohol. The actual enactment of the ban reflects their sovereignty.