James Bamford in the New York Times:
Last Aug. 17, Judge Anna Diggs Taylor of the United States District Court in Detroit issued her ruling in the A.C.L.U. case. The president, she wrote, had “undisputedly violated” not only the First and Fourth Amendments of the Constitution, but also statutory law, the Foreign Intelligence Surveillance Act. Enacted by a bipartisan Congress in 1978, the FISA statute was a response to revelations that the National Security Agency had conducted warrantless eavesdropping on Americans. To deter future administrations from similar actions, the law made a violation a felony punishable by a $10,000 fine and five years in prison.
Yet despite this ruling, the Bush Justice Department never opened an F.B.I. investigation, no special prosecutor was named, and there was no talk of impeachment in the Republican-controlled Congress.