(CNN) -

Mitt Romney's campaign bought its first ad spots in Florida since he became the presumptive Republican nominee for president, according to a GOP ad buying source.

The campaign is spending $631,685 on ads that began airing Friday in four of the ten Florida media markets - Tampa, Orlando, Jacksonville, and Ft. Myers. They represent essential battleground territories as Romney will need to win Florida's 29 electoral votes this November.

Featured in the spot that airs until July 3rd is the president's former opponent - Hillary Clinton. Using footage from a 2008 press conference, the Romney campaign accuses the president's team this year of dishonest tactics a charge similar to one from Clinton four years ago.

The "Hillary ad" will face steep competition on Florida air waves. The Obama campaign is spending $1,347,066 from June 21st - July 2nd in the same media markets as the Romney ad, as well as in Miami, West Palm Beach, and Gainesville, according to the GOP ad buying source. This brings the president's reelection ad buys in Florida to $12,208,554 since April.

Until now, the Romney campaign had only bought ads in Colorado, Iowa, North Carolina, New Hampshire, Nevada, Ohio, and Virginia since Rick Santorum suspended his campaign for president in April. The expansion into Florida comes after the campaign raised over $4.6 million dollars since Thursday's Supreme Court decision upholding the majority of the president's health care law.

Both Obama and Romney have won Florida during their campaigns for president. In the 2008 general election, the president beat Senator John McCain in the sunshine state, winning 51% of the vote. Romney picked up essential momentum this year in January, earning 46% of the GOP Florida vote after Newt Gingrich won the South Carolina primary.