Brian J. Mast
FL-21What the Signal reads
Mast is the Republican incumbent, defending a seat the Signal rates Likely R. The market has Mast at 92.7¢ against Martin's 11¢, up 2.2¢ since August 3. Mast leads 7.4 to 1 in money raised.
The market
This contract settles on whether a Republican holds the seat, not on Brian J. Mast by name.
6,672 traded · 2,926 open. Prices are the yes ask; sides may not sum to 100.Checked 2:09 PM ET
Mast v Martin
Metric by metricThe 2026 race
Florida 21st District2024 general election · previous district lines, won by Brian J. Mast.
Raised 2025 to 2026, through July 29.
THEIR SEAT WAS REDRAWNR+16.6 → R+16.3
Florida redrew its congressional map in a 2026 special session. Gov. Ron DeSantis signed the new plan (HB 1-D) on May 4, 2026; it changed 21 of the state's 28 districts. Its partisan lean barely changes (Trump +16.6 to Trump +16.3 in the 2024 presidential vote).