Atlanta-based state government reporter Christina Cassidy, an expert on voting procedures, laws and equipment, used strong source work to report that poorly marked ovals or boxes on mail-in ballots could become this year”s version of the hanging chads from the disputed 2000 presidential election.

With tens of millions of Americans filling out their ballots at home and voting by mail for the first time this year, experts anticipate that many of those voters will make mistakes marking ballots, forcing election workers to try to discern their intent. As Cassidy noted, states with a long history of voting by mail have detailed guidelines for processing and interpreting such ballots. But states that ramped up their vote-by-mail efforts this year in response to the coronavirus pandemic do not have that experience, potentially leading to confusion and disputed vote counts.