Yes american voting system should 100% run on blockchain becauss looking at the past there were some problems occuring in the real voting machine or any man can try to cheat of do anything with the voting system.
But if there is a blockchain technology then there will be less uss of machinea and it will also reduce the costing of machine and there will be a new system implemented in voting.
In blockchain technology keeps the data of even past 100 years of voting and can be in public but the real data of voting machine will be lost whenever the machine gefs failed. So there should be blockchain technology used in public voting system in america.