I seem to remember all this was in place in 1960, and there was still complaints of a stolen election.
One word: Chicago. Yes, its very likely the election was stolen in 1960. What was in place in 1960 was not what I outlined but was a lot better than what we have now. No system is perfect, but imposing the election integrity laws European countries and Canada, Mexico, Australia, India, etc have would make it much tougher to steal elections.
Because it WAS a stolen "election".