"The Department of Justice believes -- and the case law supports -- that the president has inherent authority to conduct warrantless physical searches for foreign intelligence purposes and that the president may, as he has done, delegate this authority to the attorney general,"
Clinton Deputy Attorney General Jamie S. Gorelick said in 1994 testimony before the House Permanent Select Committee on Intelligence.
That same authority, she added, pertains to electronic surveillance such as wiretaps.The National Security Agency may lawfully intercept messages between United States citizens and people overseas, even if there is no cause to believe the Americans are foreign agents.
Jabara v. Webster, 691 F2d. 272 (6th Cir. 1982). (Somebody with federal access on Lexis or Westlaw may want to Shepardize that.)
Read this, and curse them to their graves.