Special Counsel Mueller properly asked Deputy Attorney General Rod Rosenstein, a Trump appointee, whether the investigation of President Trump's attorney should be referred elsewhere. Mr. Rosenstein properly agreed and sent it to the U.S. Attorney for the Southern District of New York, another Trump appointee. On his own investigation, that U.S. attorney decided it appropriate to ask for a search warrant. That warrant request first went through several layers of review within President Trump's Justice Department. After approval, the U.S. attorney showed probable cause to a federal judge that a crime had been committed and the search warrant was granted. All appropriate steps were carried out.