The NY Times offers this report. See also this Washington Post report.
Michael McDonald writes an analysis of the Florida mail in vote and racial disparities. It begins: “This analysis shows that African-Americans are more frequently affected by easily detectable address errors on the Florida voter registration file. The information should be carefully evaluated by the Department of Justice or District Court of Washington, DC when considering approval, as required under Section 5 of the Voting Rights Act, of any proposed all-mail balloting election in the state of Florida.”
Via Ben Smith comes this analysis of how the various Florida and Michigan scenarios for resolving the delegate dispute would affect the delegate count of candidates.
A deal may be closer in Michigan.