Full weight of the democrats opposing it. If republicans move to impeach Rosenstein, the leftists will all join forces to oppose…how funny would it be if Rosenstein is working for POTUS still. Leftists asked him easy questions during the hearing because they assume he's with them. The more that republicans attack Rosenstein, the more the leftists defend him. Now, they will have to accept all evidence of Obama's treason if he presents it to them.
I'm wondering if Rosenstein is intentionally trying to get impeached. If that happens, every document is revealed to the House. Any member who sees evidence of treason and does nothing can then be charged as well.