Evidence:  1.  Russians took affirmative action to interfere in 2016 Presidential election (Source:  Repeated Congressional testimony from law enforcement and intelligence agency personnel; except Sessions, who never saw anything).  2.  Trump campaign officials and participants under FBI investigation for potential illegal or collusive contacts with Russian government officials and those with Russain government links (the fact is that the investigation existed at the time of firing).  3.  Inaccurate statements and/or omissions re: Russian contacts made on official government forms (specifically security clearance form SF-86) and to government officials (Flynn to Pence) by Trump campaign participants.  4.  Comey asserts Trump asked him to leave Flynn alone (witness testimony).  5.  Comey believes Trump tying to influence investigation (witness testimony).  6.  Comey re-confirms investigation in Congress testimony.  7.  Trump fires Comey.  8. Trump says firing about Russia investigation