Which provision of the usa patriot act of 2001 was later held to be unconstitutional

The Patriot Act of 2001 is unconstitutional due to Section 215. This violates the Fouth Ammendment.

The Fourth Amendment says that the government cannot perform searches without first getting a warrant with probable cause. The Patriot Act allowed for the CIA, FBI, and NSA to search without a warrant, thus making Section 215 unconstitutional.

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maybe by travelers or gossip

political parties are protected under 6th amendment.