Prof. Andrew Busch wrote a commentary about mail voting and election legitimacy for RealClear Politics. Co-author of Divided We Stand: The 2020 Elections and American Politics, Busch wrote that the proportion of ballots cast by mail nearly doubled from 2016 to 2020, a development that contributed to undermining confidence in results. He outlines two problems—inadequate ballot security and delayed vote totals—and ways of mitigating future concerns.