In page 213 of the Mueller Report, the Special Counsel team describes thier considerations that guided their obstruction-of-justice investigation.
First, a traditional prosecution or declination decision entails a binary determination to initiate or decline a prosecution, but we determined not to make a traditional prosecutorial judgment. The Office of Legal Counsel (OLC) has issued an opinion finding that the indictment or criminal prosecution of a sitting President would impermissibly undermine the capacity of the executive branch to perform its constitutionally assigned functions in violation of the constitutional separation of powers. Given the role of the Special Counsel as an attorney in the Department of Justice and the framework of the Special Counsel regulations, see 28 U.S.C. 515; 28 C.F.R. this Office accepted legal conclusion for the purpose of exercising prosecutorial jurisdiction. And apart from constitutional view, we recognized that a federal criminal accusation against a sitting President would place burdens on the President's capacity to govern and potentially preempt constitutional processes for addressing presidential misconduct.
Regardless of the reasoning, it is the belief of the Special Counsel's team that a sitting president cannot be indicted regardless of the crimes he committed (at least in obstruction of justice in this particular case). This seems to directly contradict the "no man is above the law" principle outlined by the 14th ammendment of the constitution.
Does the Special Counsel's non traditional prosecutorial decision making put the president above the law since he is unable to be prosecuted?