Thus, no impeachment should ever move forward without bipartisan support. That is a tall order in our age of hyperpartisan politics in which party loyalty leaves little room for neutrality. Proponents of the House vote argue it is only about procedures and not about innocence or guilt, and that further investigation may well persuade some Republicans to place principle over party and to vote for impeachment, or some Democrats to vote against impeachment. While that is entirely possible, the House vote would seem to make such nonpartisan neutrality extremely unlikely.
It is far more likely that, no matter how extensive the investigation is and regardless of what it uncovers, nearly all House Democrats will vote for impeachment and nearly all House Republicans will vote against it. Such a partisan vote would deny constitutional legitimacy to impeachment. It was because of this fear of partisanship in the House that the framers left the ultimate decision to remove an official to the Senate. The framers intended the Senate, which was not popularly elected at the time the Constitution was written, to be less partisan and act more like judges.