As I explained in my thread ('...1973...'), Mueller and the Democrats are in the midst of a treasonous attempted coup, as Mueller - 1 prosecutor- seeks to by-pass Congress and assume power greater than the Constitution in order to indict a sitting President and thereby 'UN-ELECT' a sitting President.
In 1973, under Clinton, the DOJ principals / policy was established, based on the Constitution, that s sitting President could not be indicted...and 'Un-Elected'.
Only Congress has the authority to remove a President, through the Constitutional process of Impeachment...by CONGRESS.
As far as subpoenaing a sitting President and threatening to send a sitting President to jail for refusing to agree to an interrogation, Mueller is also violating the Constitution.
A President can not be subpoenaed to testify under oath by a Prosecutor and / or Grand Jury unless in the extremist of curcumstances. In this case there is not even any evidence that a crime has been committed warranting an investigation at all, let alone one critical enough to wareant threatening to jail a President for refusing to obey a subpoena to appear before the Counsel's attempted trap.
Allowing this to continue, forgetting / ignoring the DOJ Memorandums and what was established in 1973 is proof enough that US AG Sessions is a weak, failed US AG that should be removed from office. To allow Mueller to do this is to go against established / recognized / honored DOJ policy and is allowing Mueller to usurp powers he does not have - the power to bypass Congress to execute a political assassination, 'un-electing' the President, based on ZERO evidence of any initial / existing crime....except one possibly if Mueller is successful in trying to trip Trump up.