2004Flipped from DemocraticFinal results
2004 election for U.S. Senate in Florida
U.S. Senate · Florida
Mel Martinez (R) won with 49.4% of the vote, defeating Betty Castor (D) by 1.1 points, a seat Democrats won last time.
Mel MartinezRepublican · winner
49.4%3,672,864
Betty CastorDemocrat
48.3%3,590,201
Dennis F. BradleyOther party
2.2%166,642
7,429,894 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 2004
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Betty CastorMel Martinez
$11.9M
Raised by the campaign
$12.8M
$11.8M
Spent by the campaign
$12.8M
$383.9K
Cash on hand
$20.7K
Other candidates' campaigns: Dennis F. Bradley $15.8K.
Campaign money: FEC, through Dec 31, 2004.
Source: FEC campaign filingsUpdated Dec 31, 2004