TALLAHASSEE, Fla. — Billionaire Citadel founder Ken Griffin has contributed $10 million to a political committee supporting Republican gubernatorial candidate Byron Donalds, delivering the largest reported donation of Florida’s 2026 governor’s race as the Aug. 18 primary approaches. The contribution went to Friends of Byron Donalds PAC, the state political committee supporting the Naples congressman’s campaign for governor. It was not a direct c…