“Every action that the president took was taken with full constitutional authority pursuant to Article II of the United States Constitution,” they added. “As such, these actions cannot constitute obstruction, whether viewed separately or even as a totality.”
Mr. Barr expressed a similar view in his 19-page memo written last summer and sent to the White House. Mr. Trump later picked him to replace Mr. Sessions.
Since Mr. Mueller’s report remains undisclosed, it is not known how much these constitutional arguments weighed in his decision not to make a finding on obstruction. Mr. Barr argued that since there was no underlying crime of conspiracy, it would be harder to prove a corrupt intent to obstruct.
Some expressed skepticism that the line has necessarily moved. “I don’t think that means that the definition of obstruction has changed,” said Timothy Naftali, a New York University professor and former director of the Nixon presidential library. “What I think we may find is the evidence wasn’t sufficient to take on the huge battle of indicting a president.”
But the end result may be the same in terms of setting a new standard for future presidents. The hands-off attitude when it came to investigations of the past no longer applies.
“The extremes we have gone to accommodate the president’s authority are a terrible precedent for going forward as a democracy built on separation of power and balance of powers,” said Richard Ben-Veniste, a former Watergate prosecutor.
Mr. Rivkin, however, argued that the potential downside of a president interfering in law enforcement actions out of political motives was outweighed by the danger of such powerful agencies operating without anyone overseeing them.
“Do you want to have the F.B.I., C.I.A. and N.S.A. accountable to nobody but themselves?” he asked, citing “serious abuses of civil liberties” that have occurred in American history. “Choose your poison. When someone talks about the possibility of corruption, my response is what’s the alternative? Do you have a better alternative?”