Five months before Election Day, more than 1.46 million Democrats have signed up to vote by mail compared to 1.16 million Republicans, according to state Division of Election data released Friday. By comparison, in 2016, Democrats held an advantage of about 8,800 in vote-by-mail enrollment.

The reason for the success is twofold. Democrats have put heightened emphasis on getting more people to cast ballots from home, an effort that preceded the onset of the coronavirus pandemic. And Trump has demonized this type of voting so much that Republicans, who once dominated mail-in ballots, are souring on it.

Florida’s vote-by-mail enrollment gap is among a number of warning signs for Trump, who carried the state by fewer than 113,000 votes, or 1.19 percentage points, four years ago.