The rules that govern impeachment allow for a defense against impeachment based on the articles.
What “article(s)” would they use? Obstruction. It is not there and the Mueller report is seriously flawed in its conclusions and more flawed by what it omits and what they did not investigate.
Americans have a basic sense of fairness and such a proceeding would shed a lot of light on how unfair this whole process has been. This is especially true given what we expect to learn the rest of this year regarding the origins of the investigation.
Impeachment is 100% political - NOT criminal.
Theoretically, the House Communists can impeach for almost any reason - it really doesn't matter what is the reason.
They define what is "high crimes & misdemeanors"
This is the communists last gasp at removing Trump...and they don't need a reason.
To paraphrase a former president, "It all depends on the meaning of impeachment".