"This article just sounds like someone who did not get his way on November 8, 2016. Your reprehensible candidate lost to the other reprehensible candidate. Get over it".

 You are correct in that this article, while impassioned, does not lay out a legal argument for impeachment. 

However, you might consider that its no longer about the elections results, but rather what has been learned since the election. A special counsel has been named and a grand jury has been empaneled. That loud noise resembling a freight train (some might call it strategic leaking) is the sound of federal indictments coming down. Indictments lead to proffers and "substantial cooperation" which leads to bigger, more important indictments. This is precisely how our federal judicial system is designed to operate.  Do not be fooled by the pace of the investigation. This is not a liquor store hold up and we are not watching CSI. Repeating "get over it" may be comforting now, but this case is a long way from over.