look up voter fraud somewhere you need help....
I agree with you about election security so not sure what argument you seek.
If you have a different opinion I am ok with that and respect your right to it, but as far as the GOP primary goes the only candidate for the GOP nomination that was stronger in my lifetime was Reagan who was essentially unopposed.
It is just a fact. Trump has a loyal base and that wins primaries. It does not guarantee much in the general as we found out.