The principle which undergirds the Constitution of this nation is that individuals have soverign power, and power flows from the people to the governments to which they delegate that power through their own consent.
This turned the traditional model of government, where power was vested entirely in a monarch and the citizens of a nation were subject to the whims of that king or queen and his aristocratic cadre, on its head.
If the United States government has the power to build and own atomic bombs, warships, fighter jets, and the like, that power has, by definition, its origin in the individual citizens of this nation.