..."In an impeachment proceeding, the key question isn’t whether the president technically violated one or more of the federal obstruction statutes. It’s whether his transgressions are serious enough to justify removal from office."...
...“There is a further requirement—substantiality.” Impeachment should “be predicated only upon conduct seriously incompatible with either the constitutional form and principles of our government or the proper performance of constitutional duties of the presidential office.”...
...“There is a further requirement—substantiality.” Impeachment should “be predicated only upon conduct seriously incompatible with either the constitutional form and principles of our government or the proper performance of constitutional duties of the presidential office.”But for the purposes of an impeachment, arguably, it should. "...
Criminal Obstruction vs. Impeachable Obstruction