The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
The Constitution is written in plain English. Searches require warrants. Warrants require probable cause. Today the Second Circuit Court of Appeals did not examine the constitutionality of the surveillance program however it did decide that the National Security Agency’s (NSA) collection of millions of Americans’ phone records without a warrant is, in fact, illegal.