Among them is Gov. Rick Scott.
"I already voted," Scott said Wednesday after speaking at a Florida Chamber Foundation event in St. Petersburg.
He voted by mail-in ballot for the Aug. 30 primary election. Early in-person voting begins across the state this week and has already started in some counties, including Hillsborough.
But the governor is keeping quiet who he voted for, including in a Republican primary for the U.S. Senate that's pitting Sen. Marco Rubio against Bradenton developer Carlos Beruff, who is close with Scott.
Several Scott confidantes and former staffers are involved in Beruff's campaign, including Melissa Stone, the governor's former chief of staff who managed his 2014 reelection.
Though other statewide elected officials have publicly supported Rubio, Scott hasn't endorsed either Republican candidate -- and didn't Wednesday.
"It's a secret ballot still," Scott said.