the suppression of votes by every method imaginable: voter ID requirements, reduction in the number of voting sites or the times for voting, large scale gerrymandering, falsifying or altering records of party affiliation, etc, etc., etc.
And as if that's not enough, the voting machines are manufactured and programmed through the oversight and technical control of far right companies which can easily rig or alter the results by whatever percentage they deem necessary. And nothing can be done about it because to even investigate the machines before or after the vote is impossible because of the "proprietary rights" of corporations and companies. In other words there's almost no provision made for verifying the vote, so that even when the results are clearly statistically impossible, nothing is done or in most states can even be done to put things right.
GA, TX and some other red states would already be blue I believe but for this war being waged to make sure the election results are what the right wingers want them to be.
Maybe Trump's obvious unfitness for office and some help coming from the judiciaries in various states will begin to change some of the roadblocks to fair voting. We can pray anyway. Unfortunately, right now, that's about all the average voter can do.