Andrew Jackson was shot at twice by the same man. Both pistols failed to fire. Subsequent testing by government agents showed the pistols to be in good working order.
Then there was FDR and Mayor Anton Cermak. Cermak killed FDR missed.
Some theorized that Cemak was the real target. The president being there was just collateral. The Chicago way, you know.
My dad was in the crowd and saw the shooter miss FDR and Cermac was killed. I think it was in Maimi.