“He had the opportunity to make a decision about obstruction, and he chose to punt,” Connolly said.

“And so we — at Mueller’s own hand here — we have seen further accretion of executive power, when he could have helped fortify constraints, checks and balances,” he added. “And I think that’s an almost-tragic missed opportunity, because he pulled his punches.”…

Rep. Jamie Raskin (D-Md.), a former constitutional law professor, characterized the development as “a major shattering of a historical understanding” that DOJ investigations be allowed to proceed without White House interference.

“Prior to President Trump, presidents simply did not attempt to interfere in ongoing criminal investigations, much less criminal investigations [that involved the president and his advisors],” Raskin said Friday by phone.