“I can tell you that jurors don’t always do as expected.”
These aren’t normal jurors. Normal jurors don’t tell you how they are going to vote before the trial. Numerous senators have already indicated how they are going to vote.
Jurors don’t have to run for re-election.
Jurors don’t have to worry that the decision they render will be flipping a big “F.U.!” to 95% of their voters.