Democrats are an uncertainty while Republicans are a certainty to vote against this kind of reform. To me the solution is clear, remove the certainty, get so many DNC in there that expulsion becomes viable without handing the reigns over to Rs.

I'm pretty sure if that were the case then someone would have blown the whistle on this several years ago. These people employ staffers, many of whom are very ideologically dedicated to the progressive cause, and would not hesitate to become a person familiar with the manner who agreed to an interview on condition of anonymity. In fact, this is probably where 90% of Congress leaks come from.