There was a time when the USA had a single day for voting and absentee ballots for those who could not vote on election day.
We are a lawless country.
Early voting allows more opportunity for voter fraud, is unfair to surging candidates, and, overall, makes the results less convincing.
Are there any other countries that support early voting? How are they doing?
Yes. I think I looked it up on Wiki and was dismayed not only at our system, but all over. Not surprising, though, as so many are not truly great systems.