We now know that it wasn't the two in all the pics that took him out. So perhaps it was the one on the water tower who took out the shooter (witness claimed they saw someone up there) or it was the team on the grandstand that got him.
I was thinking the other day that the assassination was Joe's last chance to stay in.
He failed and now he's done, however they don't have a clue how to let Kameltoe be el presidente and NOT the 24 candidate.