The Obama administration for the first time responded to a Spygate lawsuit, telling a federal judge the wholesale vacuuming up of all phone-call metadata in the United States is in the “public interest,” does not breach the constitutional rights of Americans and cannot be challenged in a court of law.

Thursday’s response marks the first time the administration has officially answered one of at least four lawsuits challenging the constitutionality of a secret U.S. snooping program the Guardian newspaper disclosed last month. The administration’s filing sets the stage for what is to be a lengthy legal odyssey — one likely to outlive the Obama presidency — that will define the privacy rights of Americans for years to come.

The New York federal district court lawsuit, brought by the American Civil Liberties Union, demands a federal judge immediately halt the spy program the civil rights group labeled as “one of the largest surveillance efforts ever launched by a democratic government.”

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