Romney was actually on the airwaves more in 2008, when he lost the state to Sen. John McCain. But in this race, he dominated the airwaves against his rivals, airing almost 13,000 ads on broadcast television across the state, as of Wednesday, Jan. 25 -- much more than Gingrich and his support groups, which together have aired about 200 spots, according to the Wesleyan Media Project.
Ninety-two percent of all TV ads aired in the Sunshine State over the last week were negative, mostly targeted at Gingrich, according to Kantar Media Campaign Media Analysis Group.
Gingrich had made his mark by stellar debate performances that set him apart from other candidates. It was one of the reasons why he won by an overwhelming margin in South Carolina. But that changed last week as Romney aggressively attacked Gingrich on his past connections to Freddie Mac and his immigration ads.
Fifty delegates are at stake in today's primary, an important number for Romney.
ABC News' Gary Langer and Elizabeth Hartfield contributed to this report.