The Fourth Amendment was introduced in Congress in 1789 by James Madison, along with the other amendments in the Bill of Rights, in response to Anti-Federalist objections to the new Constitution.

The Fourth Amendment was introduced in Congress in 1789 by James Madison, along with the other amendments in the Bill of Rights, in response to Anti-Federalist objections to the new Constitution.

It's official: The FBI's warrantless searches of communications seized to protect US national security have at last been ruled unconstitutional and in violation of the Fourth Amendment.

The Fourth Amendment protects Americans from “unreasonable searches and seizures” by the government. But the Supreme Court's interpretation of “unreasonable” has varied over time.