As of Election Day, November 3, electoral authorities had received over 65 million mail ballots, with over 27 million votes outstanding – figures that more than double the 33,378,450 postal votes received in the 2016 election. Regulations in most states require the United States Postal Service (USPS) deliver ballots to electoral bodies. Some stakeholders expressed concern that the volume of mail generated by postal voting could not be adequately managed by the USPS in a timely manner and could lead to ballot tampering and other forms of voter fraud. As a result, the pre-electoral period saw increased litigation on aspects of postal voting mechanisms.