After receiving an affidavit or other information, a magistrate judge-or if authorized by Rule 41(b), a judge of a state court of record-must issue the warrant if there is probable cause to search for and seize a person or property or to install and use a tracking device.Fed.R.Crim.P. 41(d) (emphasis added).The Government argues that 18 U.S.C. ?? 2703(d) on its face requires only that it make a sh