(4:42 p.m. ET)

In a conference call with reporters, the Clinton campaign savaged Barack Obama for buying a national ad on CNN that can be seen by 92 percent of households in Florida. The candidates have all pledged not to campaign or run ads in the Sunshine State as part of a promise to uphold Democratic National Committee rules. Florida violated those rules by moving its primary before Feb 5.

Iowa Gov. Tom Vilsack said, "Words matter, promises matter and pledges matter," and asked, "What other promises or pledges is he making to Democrats across the country that he won't keep?" Vilsack also wondered if he meant what he said when he signed the pledge, or whether "losing three in a row meant they'd decided to sacrifice their integrity."

Florida Rep. Debbie Wasserman-Schultz said Obama "had pushed the panic button" by buying the ad, contending that Obama's "word doesn't always mean what it says."

"When you're running for president rules matter. Can't just cast aside when they're no longer convenient for you."

But the Obama camp said Clinton's attack on the advertising was misguided.

"Both national cable networks told us it would be impossible for us to run advertising nationally that excluded only Florida. For that reason we consulted with the South Carolina Democratic Party chair, Carol Fowler, who told us unequivocally she did not consider this to be in violation of pledge made to the early states," said Obama campaign spokesman Bill Burton.

The Clinton campaign surrogates argued that the Obama camp made a strategic decision, done with full knowledge of the implications and the Obama campaign could have bought ads in separate markets across the country instead.

Folks on the call also made clear that they were reviewing all their Florida options in the wake of the Obama campaign's decision.

-- Dispatch from FOX News' Aaron Bruns

(12:30 p.m. ET)

A firefighters' group opposing Rudy Giuliani has been in Florida to rally their Sunshine State brethren when voters hit the polls in eight days.

The International Association of Firefighters Interested in Registration and Education PAC declared on Jan. 18 that it spent $43,661 in estimated travel costs to Florida for vocal Giuliani opponents who are family members of firefighters who died in the attacks. The costs also included press materials for the stated purpose of opposing Giuliani, according to a review of Federal Election Commission records viewed by FOXNews.com.

Click here to see the FEC records.

Giuliani, the former New York mayor who has staked much of his campaign on his handling of the crisis surrounding the Sept. 11, 2001, terror attacks on his city, has faced heavy criticism from some city firefighters, who have said he made wrong decisions in the clean up that put firefighters' safety at risk.

Click here to read the March 8, 2007, story on FOXNews.com.

In March, an unreleased letter by the IAFF that became public blamed Giuliani for "unforgivable" post-terror attack decisions, including reducing the number of firefighters involved in the recovery operation and focusing too heavily on recovering valuable goods rather than bodies.

(11:09 a.m. ET)

Fred Thompson came in a disappointing third in South Carolina and all eyes are on him as he decides whether to continue fighting for the GOP presidential nomination.

No announcements are expected Monday while Thompson -- a former U.S. senator from Tennessee -- is in his home state visiting his aging mother who is recuperating from an illness.

Thompson, who placed third in Saturday's primary battle in The Palmetto State despite claims that he could win, is expected to say something definitive Tuesday.

If Thompson decides to leave the race, that would open up a source of conservative voters, a bloc that Mike Huckabee would like to scoop up, or security-minded voters, which Rudy Giuliani and John McCain likely would vie for.

Campaign sources tell FOX News that no one would be surprised if he withdraws, but they also have no idea which way he will go. And should he decide to continue, there is some money in the bank.

Fundraising in the fourth quarter was soft for the Thompson campaign.

Aides also are acknowledging the obvious: Results Saturday in South Carolina were very disappointing, and taking third place was not a momentum-builder.

On Jan. 8, the campaign staff took a pay cut, and Thompson knows he owes his staff some certainty so they can plan their own futures, especially younger staffers who need a paycheck.

FOX News' Carl Cameron contributed to this report.