Fourth Amendment Protection Act

The Fourth Amendment Protection Acts, are a collection of state legislation aimed at withdrawing state support for bulk data (metadata) collection and ban the use of warrant-less data in state courts. They are proposed nullification laws that, if enacted as law, would prohibit the state governments from co-operating with the National Security Agency, whose mass surveillance efforts are seen as unconstitutional by the proposals' proponents.

Source: Wikipedia — Fourth Amendment Protection Act (CC BY-SA 4.0)