Which principle is NOT a fundamental aspect of the U.S. Constitution?

The principle that is not a fundamental aspect of the U.S. Constitution is absolute monarchy. The U.S. Constitution is rooted in the ideas of democracy and representation, which promote the power of the people and a system of government that is accountable to its citizens.

In contrast, an absolute monarchy is a form of government where a single ruler, typically a king or queen, holds supreme authority and is not bound by a constitution or laws. This system stands in stark opposition to the principles enshrined in the Constitution, such as checks and balances, federalism, and popular sovereignty, which all emphasize the distribution of power, the separation of governmental powers, and the ultimate authority of the people in a democratic framework. These essential principles reflect the Founding Fathers' vision of a government that is responsive to the will of the citizens rather than a monarchy with unchecked power.