The five remaining GOP candidates for President - Newt Gingrich, Ron Paul, Rick Perry, Mitt Romney and Rick Santorum - gathered for a debate in South Carolina on Monday night, ahead of the state's primary this Saturday.

The candidates took the opportunity to take aim at one another.

Gingrich and Perry challenged Romney, who defended himself and his record, while Ron Paul defended his ads against Rick Santorum:

The topic of attack ads was a hot topic, especially in a back-and-forth between Santorum and Romney:

In another charged moment, Gingrich and FOX Contributor Juan Williams had an exchange about recent comments Gingrich made that Williams said could be taken as racially insensitive:

Candidates did take an opportunity to promote their own campaigns without mentioning each other.

Each candidate took time to weigh in on the federal income tax:

Overall, strong words from the remaining Republican candidates.

FOX News Radio's Rich Johnson has a wrap-up from Myrtle Beach, South Carolina:

From America's Election Headquarters...

(Gingrich)"More people have been put on food stamps by Barack Obama than any President in American history."

Big cheers for Newt Gingrich with that blast of the President. Gingrich also rejecting the notion that giving kids jobs to instill a work ethic is insulting, especially to African-Americans.

A hint, but not a definite yes, from Mitt Romney about releasing his tax returns...

(Romney)"I'm gonna get asked to do that around the April time period. I'll keep that open."

And Ron Paul says his ad attacking Rick Santorum on several points, did come up a bit short.

(Paul)"I only had one problem. I couldn't get in all the things I wanted to say in one minute."

A sampling of some of the sharp attacks in a debate in a state where many Republicans are still trying to make up their minds.

In Myrtle Beach, Rich Johnson, FOX News Radio