Huckabee, who won the Iowa caucuses but finished second in South Carolina, faces financial pressures of his own. Some campaign aides have been laid off, while others work for no pay. He has promoted his plan for a "fair tax" or national sales tax.
Paul calls for lower taxes and less spending to reduce the federal debt.
A new poll shows McCain leading Romney in Florida, 25%-23%. Giuliani, who once led in the state, slipped and is tied with Huckabee at 15%. The poll by the St. Petersburg Times and The Miami Herald of 800 registered and frequent voters was taken Sunday-Tuesday and has a margin of error of +/—5.1 percentage points.
How the GOP contenders would reduce taxes:
The Republican presidential contenders debate today in Boca Raton, Fla. Reducing the bite on taxpayers is a likely topic. A sample of their plans:
Sources: The Associated Press, campaign websites and USA TODAY research
Contributing: Associated Press