The law of the United States consists of many levels of codified and uncodified forms of law, of which the most important is the United States Constitution, the foundation of the federal government of the United States. The Constitution sets out the boundaries of federal law, which consists of constitutional acts of Congress, constitutional treaties ratified by Congress, constitutional regulations promulgated by the executive branch, and case law...
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The law of the United States consists of many levels of codified and uncodified forms of law, of which the most important is the United States Constitution, the foundation of the federal government of the United States. The Constitution sets out the boundaries of federal law, which consists of constitutional acts of Congress, constitutional treaties ratified by Congress, constitutional regulations promulgated by the executive branch, and case law originating from the federal judiciary.
The Constitution and federal law are the supreme law of the land, thus circumscribing state and territorial laws in the fifty U.S. states and in the territories. In the unique dual-sovereign system of American federalism (actually tripartite when one includes Indian reservations), states are the plenary sovereigns, while the federal sovereign possesses only the limited supreme authority enumerated in the Constitution. Indeed, states may grant their citizens broader rights than the federal Constitution...
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