inverse, your understanding and interpretation of current events leaves something to be desired. It is not President Trump's firing of James Comey that means anything (it was completely legal and in many ways justified). The so-called “fatal mistake” he made was telling Comey he should drop the investigation of Michael Flynn. Pressuring the FBI director in this manner IS a crime — otherwise known as “obstruction of justice.” You could be a small-town security guard or the President of the United States. The crime is treated the same — subpoenas are issued, charges are brought and the allegations are adjudicated in a court of law.