Orin Kerr (law professor at George Washington University) has written on the subject of whether the collection of phone metadata violates the 4th Amendment, giv

Orin Kerr (law professor at George Washington University) has written on the subject of whether the collection of phone metadata violates the 4th Amendment, given the history of Supreme Court opinions on the matter: http://www.volokh.com/2013/07/17/metadata-the-nsa-and-the-fourth-amendment-a-constitutional-analysis-of-collecting-and-querying-call-records-databases/ http://www.volokh.com/2013/07/17/metadata-the-nsa-and-the-fo... In short, these legal actions have a hard journey ahead of them.