Control of the U.S. Senate could turn on this Florida seat, deciding which party holds the chamber's majority.

The victor will shape committee chairs, judicial confirmations, and the legislative agenda for the next Congress.

Republican nominee and Democratic nominee are the primary actors, backed by state parties and national committees.

Super PACs, unions, business groups, and prominent Florida elected officials also influence messaging and turnout on both sides.

Polling shifts, early-vote patterns, and turnout among suburban, Black, and Latino voters will swing probabilities.

Campaign advertising, endorsements, national spending, legal challenges to ballots, and the national political environment also move the race.

Early voting tallies and county-by-county returns on election night will reveal whether one party's ground game outperformed expectations.

Look for the voter-registration deadline, major debates, late polling releases, and any court rulings on absentee or ballot-processing rules.