For example, Barr's Summary specifically says Mueller did not exonerate trump.
Here's the language from Barr's Summary:
"After making a thorough factual investigation into these matters, the Special Counsel considered whether to evaluate the conduct under Department standards regarding prosecution and conviction but ultimately determined not to make a traditional prosecutorial judgment. The Special Counsel therefore did not draw a conclusion one way or the other as to whether the examined conduct constituted obstruction. Instead, for each of the relevant actions investigated, the report sets out evidence on both sides of the question and leaves unresolved what the Special Counsel views as difficult issues of law and fact concerning whether the Presidents actions and intent could be viewed as obstruction. The Special Counsels report states that while this report does not conclude that the President committed a crime, it also does not exonerate him.
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Why give Mueller a chance to say, "Congressperson, maybe you ought to read the documents you are asking me about."
Further, Barr's summary specifically admits Russia interfered in the election through a Disinformation campaign and hacking.
I think trump's campaign did conspire/coordinate/collude with the Ruskies, but Mueller's Report concludes exactly what Barr said in his summary: As the report states and Barr quoted in his summary: [T]he investigation did not establish that members of the Trump Campaign conspired or coordinated with the Russian government in its election interference activities.
I think Barr did err in his summary that if there is no underlying crime, there can't be Obstruction. But, even Mueller's Report gives trump an out with respect to that.
And, Obstruction loses some of its impact unless we get Mueller to make a point that Obstruction kept the investigation from determining pertinent facts. That's one of the questions that our Party needs ask Mueller pointedly.
If the Committee doesn't get to the heart of the matter, this aspect of Impeachment is likely dead after Wednesday. Personally, at this point, I think we have a better shot investigating other matters regarding Impeachment such as Presidential racism, dereliction of duty, campaign finance irregularities, attempting to prosecute political opponents (like Clinton), advocating violence, breaking treaties, incompetence in office, disregarding Presidential functions, abuse of power, violating free speech, and a whole lot more.