I’ve published quite a bit on the topic, served as an expert witness in dozens of successful lawsuits, and know these files inside and out.
Here are the facts, using proper voter files (i.e., contemporaneous), comparing Jan-July 2016 registration numbers with Jan-July 2020 voter registration numbers, comparing apples to apples.
To look at new registrations (that is, how the parties and groups are doing on the ground), you cannot merely use the Florida Division of Elections summary files to figure this out, as I explained four years ago, here.
OK, here are the numbers. Comparable voter registration, as of July 1, 2020, was down by a total of 136,392 registrants. And Democrats and Republicans both account for 32.1% of new registrants over the first six months of the year.
New Registrations by Party, January-June, 2016 vs. January-June 2020
So, cut these numbers as you will, but by no means can it be said that Democrats are killing it out there. In fact, a total of 33 more Republicans registered to vote anew between January 1 and June 30 (and remained registered as of June 30) than newly registered Democrats.
COVID-19 is obviously the major reason why Democratic numbers are down, as nonpartisan groups who usually hit the ground are not as active, SOEs who usually are in the schools preregistering young voters had no classrooms to go to in April or May, etc. We’ve seen this pattern before, in 2011, after the Republican legislature passed HB 1355, which, among other things, cracked down on voter registration efforts by 3PVROs, as Michael Herron and I have written about before.
Perhaps Democrats and their allies will turn it around before the October registration date. Young voters who register immediately before an election in Florida are more likely to turn out in that proximate election, as Enrijeta Shino and I find, but their turnout levels aren’t sustained in subsequent elections, casting some doubt on the habitualization of voting.
But until we get some book closing numbers, the data are what they are. Republicans, as a proportion of new registrants in Florida, are doing better than they did four years ago over the first six months of the presidential election year.