4. Pro tip: voter fraud sounds big at first. I have learned the hard way by covering elections that often there are claims that make it sound like we have finally stumbled on a giant voter fraud story, but then it doesn't pan out that way. Detroit, Michigan in 2016 would be a perfect example, when hundreds of precincts couldn't be fully recounted, because of polling irregularities. But after a review by state elections officials, there wasn't much to see. "The total number of ballots in question in the remaining precincts was less than 600 out of 250,000 total cast citywide, and Elections staff was able to reduce that number to less than 200," read the Michigan election review. Officials also found 31 people may have voted twice - out of over 4.5 million. That's a fraud rate of 0.00000681318%.
5. In North Carolina it was 0.00010583333%. North Carolina's audit of its 2016 election results found 508 illegal votes out of 4.8 million. While Michigan had 31 cases of double voting, North Carolina had 24. So, yes, there is evidence of voter fraud - but no, there is not evidence of 3-5 million illegal votes being cast in an election.