A legal doctrine that states that one law is superior to another; some federal laws preempt state laws.
Related information about preemption:
- Preemption - Wikipedia, the free encyclopedia
 Preemption or pre-emption may refer to: [edit] Legal. Federal preemption,   displacement of U.S. state law by U.S. Federal law; "Preemption" is also   sometimes ...
 
- Federal preemption - Wikipedia, the free encyclopedia
 From Wikipedia, the free encyclopedia. Jump to: navigation, search. Federal   preemption refers to the invalidation of a US state law when it conflicts with   Federal ...
 
- Preemption - Merriam-Webster Online
 a : the right of purchasing before others; especially : one given by the government   to the actual settler upon a tract of public land. b : the purchase of something ...
 
- Preemption - Legal Dictionary - The Free Dictionary
 A doctrine based on the Supremacy Clause of the U.S. Constitution that holds   that certain matters are of such a national, as opposed to local, character that ...
 
- The Supremacy Clause and Federal Preemption
 The preemption doctrine derives from the Supremacy Clause of the Constitution   which states that the "Constitution and the laws of the United States...shall be ...
 
- Preemption | LII / Legal Information Institute
 When state law and federal law conflict, federal law displaces, or preempts, state   law, due to the Supremacy Clause of the Constitution. U.S. Const. art. VI., § 2.
 
- Federal Preemption of State Law
 Federal Preemption of State Law - Wisconsin Legislative Reference Bureau   produces Constitutional Highlights, which are summaries of constitutional issues   of ...
 
- Preemption in Public Health | Public Health Law Center
 Preemption occurs when, by legislative or regulatory action, a “higher” level of   government (state or federal) eliminates or reduces the authority of a “lower” level ...