“Mueller was appointed as a Special Counsel by Rod Rosenstein in May 2017 pursuant to Rosenstein’s authority as Acting Attorney General. In the
appointment order, Rosenstein states that Mueller is subject to the regulations governing special counsels. One of those
regulations, 28 CFR §600.7 (a), specifies that the special counsel must “comply with the rules, regulations, procedures, practices and policies of the Department of Justice.”
Therefore, Mueller must comply with the policies of the Justice Department – and the policy of the department according to the opinions issued in 1973 and 2000 is that a sitting president cannot be criminally indicted or prosecuted.”
https://www.heritage.org/crime-and-...ueller-indicting-trump-wont-happen-even-if-he