From Brennan Center:

Christopher Deluzio, Liz Howard, Paul Rosenzweig, David Salvo, and Rachael Dean Wilson,  Defending Elections: Federal Funding Needs for State Election Security, University of Pittsburgh Institute for Cyber Law, Policy, and Security, Brennan Center for Justice, R Street Institute, Alliance for Securing Democracy, July 18, 2019, https://www.brennancenter.org/sites/default/files/publications/2019_07_EACFunding%20Report_FINAL.pdf.