I did not see any of this, but others did:
CNN Political Ticker: GOP candidates battle over conservative credentials
Republican presidential candidates clashed Sunday over who is conservative enough to defeat Democratic front-runner Hillary Rodham Clinton, ahead of an evening debate in Florida.
Live-blogging from The Caucus (NY Times)
AP via Washington Post:
Reportedly McCain attacked Romney and Thompson attacked Giuliani.
The clashes, in the early moments of a 90-minute debate, prompted former Arkansas Gov. Mike Huckabee to say he wanted no part of a “demolition derby” with others of his own party. “What I’m interested in is fighting for the American people.”
Fox News: Cat Fight Hisses in Republican Presidential Primary Debate
MSNBC First-Read’s Live-Blogging