The Senate will destroy Biden, Hillary will be drafted at their convention.
That is why they will never vote on impeachment. Once they vote, they lose control of the daily narrative. Instead, what Pelosi is going to do is have continuous “impeachment inquiry” hearings to create public perception that Trump committed impeachable offenses.
I think that while the candidates are held up in the Senate trial, that Hillary will announce her campaign. They won’t be able to get out and campaign against her, so it gives her the opening she wants right before the voting begins.