Amendment IV
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
The 4th amendment to the constitution. As I'm sure any tea-partier can tell you the Bill of Rights are actually amendments to the US constitution.
Seems quite simple doesn't it ? The idea is that the government can't search you, your house, your effects without probable cause and a warrant describing the place to be searched.
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