The internment of Japanese-Americans during WWII was an action which was totally unjustified and barbaric. Firstly, this same treatment wasn’t given to German or Italian Americans, implying a distrust of Asian people at the time, an extremely racist ideology. Secondly, the Japanese Americans had no ties to the Japanese government, they weren’t soldiers or spies, this again would totally destroy any legitimacy of holding Japanese Americans in internment camps.
The U.S. Constitution is based on several principles of American democracy. Yes, it is reflected because the amendments list the powers given to the individual people.
Bills are referred by the "Speaker of the House" in the House of Representatives and the "Senate Majority Leader" in the Senate, although it should be noted that bills can be proposed by any legislator.