Both wings of the Jewniparty will bring out all the stops on rigging and assassination if that happens. He will have to go full mussolini and simply show up and demand the presidency, and he will need his own militia for that, because the US military is completely zogged.
The issue with not voting is that the elections are so blatantly rigged, whoever the jews want will just win anyway, and it will be a much wider margin without actual voters.