So began a long and fruitful relationship between the GOP and absentee voting. Republican campaigns invested millions of dollars encouraging their supporters to cast ballots by mail. State legislators passed laws making it easier. Over the ensuing decades, GOP voters in Florida became so comfortable with casting ballots by mail that in 2020, nearly 35 percent of those who turned out did so, according to state data compiled by University of Florida political science professor Daniel A. Smith. Virtually every narrow Republican victor of the past generation — and there have been many, including two of the state’s current top officeholders, Gov. Ron DeSantis and Sen. Rick Scott — owes their victory, at least in part, to mail voting. Now, some Florida Republicans are reacting with alarm after the GOP-dominated state legislature, with DeSantis’s support, passed a far-reaching bill Thursday night that puts new restrictions on the use of mail ballots. Not only are GOP lawmakers reversing statutes that their own predecessors put in place, but they are also curtailing a practice that millions of state Republicans use, despite former president Donald Trump’s relentless and baseless claims that it invites fraud.