Due to the Supremacy Clause in the United States Constitution, federal law overrides state law in most cases. The Supremacy Clause is closely related to the idea of preemption. More »

The legislative branch of the U.S. government, collectively known as Congress, has the authority to make federal laws in the United States, according to attorney Lloyd Duhaime and iCivics. Article 1 of the U.S. Constitut... More »

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The Americans with Disabilities Act of 1990 is an example of a federal mandate. Federal mandates are laws passed by Congress and signed by the president requiring compliance by the states under threat of legal action, sa... More »

The difference between federal, state and local law is that federal laws are made to apply throughout the United States, state laws are enforceable at the state level, and local laws only pertain to the local municipalit... More »

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The Supremacy Clause is defined in Article VI of the Constitution as giving the federal government priority in any case where state or local laws hinder legislation passed by Congress. According to HowStuffWorks, the fed... More »

An informal amendment to the United States Constitution is one that occurs through non-traditional processes such as "de facto" changes of law. These processes of amendment, which may be the result of either circumstanti... More »

A congressional override occurs when the U.S. Congress passes a bill into law in spite of a president's veto. Although presidents have the power to veto bills passed by Congress, the House and Senate have the constitutio... More »