Klayman v. Obama
Larry Klayman, conservative activist and founder of Judicial Watch and Freedom Watch, was among the first plaintiffs to sue the National Security Agency (NSA) over the collection of telephone metadata from Verizon customers that was detailed in documents released by Edward Snowden. In December 2013, Judge Richard Leon issued a preliminary ruling that the program was likely unconstitutional, and the case is currently on appeal before the U.S. Court of Appeals for the District of Columbia Circuit.
Together with the ACLU and the ACLU of the Nation's Capital, EFF filed an amicus brief repudiating arguments by the government that the records are "just metadata" and therefore not as sensitive as the contents of phone calls. We were allowed 10 minutes at oral argument, which took place on November 4 before Judges Brown, Williams, and Sentelle. You can hear a recording of the oral argument here.