"I don't think they envisioned him not being mentioned, and I don't think they envisioned him not being the front-runner in national polls," pollster Scott Rasmussen said.
Florida do-or-die for Giuliani →
"Both result from the fact that independent voters are not allowed to participate in Florida's Republican primary. In McCain's earlier victories, he has been competitive among Republican voters but won with the votes of independents," he said.
Romney tops polls in key Florida vote →