Mueller’s team has a draft letter by Trump and an aide, laying out reasons for firing Comey, according to a person familiar with the probe.

…During a May weekend at the president’s New Jersey golf club, Trump asked White House aide Stephen Miller to draft a letter outlining a case for Comey’s firing, according to two people familiar with the situation. But the letter, which contained a rationale for the dismissal, was not sent after White House counsel Don McGahn objected, thinking some of its contents were problematic, according to one of the people familiar with the letter.

Special Counsel Mueller has Trump’s draft letter on reasons for firing FBI Director James Comey: Source

hmmmm