At The New York Review of Books' NR Daily Murry Waas points out that the Mueller teams’ report establishes:
By the time the President spoke to Comey about Flynn, DOJ officials had informed McGahn, who informed the President, that Flynn’s statements to senior White House officials about his contacts with Kislyak were not true and that Flynn had told the same version of events to the FBI. McGahn also informed the President that Flynn’s conduct could violate 18 USC §1001. [US Code Title 18 § 1001 is the federal statute that makes it a felony to lie to the FBI or other federal investigators, a crime that Flynn did indeed later plead guilty to.]
Trump knew Flynn was under FBI investigate when he asked Comey to let him go. This is directly contrary to Trump’s lawyers repeatedly claiming Trump was ignorant of the investigation at the time. His knowledge of the investigation, according to Waas, establishes clear guilt of obstruction:
Two people directly involved in the case told me that several of the special counsel’s prosecutors privately considered this information to be a “smoking gun” suggesting that the president acted criminally.
In my own opinion, any Congressperson who does not favor immediate impeachment proceedings fails her or his Constitutional oath.