This farce will come down to strict partisan lines.
Even if some Democrats don’t like the “case”, they need to face their own base for re-election.
(Addition note)
The most likely candidate to vote acquittal are Sens. Joe Manchin (D-WV) and Kyrsten Sinema (D-AZ).
Maybe once they vote, the will pull a Jeff Van Drew. Who knows, if they switch, it is still “good” for our side.