Democrats hold voter registration advantage
Florida's voter breakdown as per Division of Elections:
Democrats: 4.56 million
Republicans: 4.01 million
Independent/other: 2.6 million
That would give Democrats an advantage of about 555,000.
Democrats point to a larger spread, relying on the most current overall registration, not the "active" designation number DOE uses. By that count there are 5.02 million Democrats (41%); 4.35 million Republicans (35%); and 2.9 million independents (24%).
NOTE: This blog was modified to highlight numbers on the DOE website, which looks at active registration.