In the US the national government derives its power from?

In the United States, the national government derives its power from the Constitution, which establishes the framework for federal authority and governance. Specifically, the Constitution's Supremacy Clause asserts that federal law takes precedence over state laws. Additionally, the government's powers are further defined by the enumerated powers listed in Article I, Section 8, as well as the implied powers that allow for necessary and proper legislation. Ultimately, the authority of the national government is rooted in the consent of the governed, reflecting the democratic principles of the nation.