Except for ONE HOLDOUT, the Manafort jury would have said he was GUILTY ON ALL 18 COUNTS. One juror. WHY?

It was reported that the ONE HOLDOUT was  donjohn supporter. Now I don't know if there were other donjohn supporters on the jury. If there were why did that ONE HOLDOUT hold out? If what has been reported is true it just seems very odd. Surely the other 11 weren't all Democrats. It's kinda puzzling.