Let us reason together for a moment, please... ...so a sudden fire engulfs Trump Tower in New York under suspicious circumstances. A Tower the Secret Service is responsible to protect. Members of the First Family some times reside in Trump Tower. Fire Rises. The fire can be interpreted as a potential assassination attempt against members of the first family. According to 18 US Code 3056 the United States Secret Service has full and complete authority to investigate that assassination attempt against the First Family. They do not require the Justice Department nor the FBI to be involved. They are obliged to use all necessary resources within the Federal Government to find the perpetrators, and co-conspirators, who carried out that possible assassination attempt- including all relevant phone records.  So, hypothetically, if an FBI informant were to set a fire under the president's residence, then in the ensuing chaos the would-be assassin plant's evidence against the president, which is subsequently used to get a warrant to search the President's Lawyer's office.  While in the Lawyer's office, the co-conspirator to the assassination fbi agent leaves black mail material against the President.  The president is told to either act according to the conspirator's wishes or his family will be assassinated by members of the conspiracy who set fire to his home. The secret service could round up many useful idiots in involved this assassination conspiracy, including members of the DOJ and FBI. Luckily, the Secret Service has access to those phone records. Too bad for the conspiracy that fire rises.