Polls Give Romney Commanding Lead TAMPA, Fla. - What a difference a week makes, in a primary state like none before it. Confirming poll results released over the weekend, the latest Quinnipiac University poll showed Mitt Romney with a 14-point advantage over Newt Gingrich among likely voters in Tuesday's Republican primary in Florida. That's quite a turnaround from a little more than a week ago, when Mr. Gingrich's win in South Carolina seemed, in many polls, to have put a significant dent in Mr. Romney's earlier leads. In the Quinnipiac survey released Monday, one of the few taken after the G.O.P."s final debate in the state on Thursday night, Mr. Romney received the backing of 43 percent of those surveyed Friday through Sunday, while 29 percent supported Mr. Gingrich, the former speaker of the House. Rick Santorum and Ron Paul each had 11 percent. While only 7 percent remain undecided, about one-fourth of the voters said they could still change their minds before casting their votes on Tuesday. Throughout this primary season, polls have indicated how in flux the Republican electorate is, with voters signaling their willingness to alter their decisions. In South Carolina, where Mr. Gingrich's personal life - including his three marriages - was put in the spotlight, voters did not seem to split along gender lines in choosing him. But Mr. Gingrich's decline in some recent polls suggests that he may be having trouble appealing to women. Mr. Romney has a 15-point advantage over Mr. Gingrich in the NBC News/Marist poll: 42 percent for Mr. Romney and 27 percent prefer Mr. Gingrich. In this poll, men are 9 points more likely to choose Mr. Romney, while he has a 21-point advantage among women. In the Mason Dixon poll conducted for The Tampa Bay Times, The Miami Herald, El Nuevo Herald and the television stations Bay News 9 in the Tampa area and Central Florida News 13 in Orlando, 42 percent of Republican primary voters went for Mr. Romney while 31 percent chose Mr. Gingrich. While Mr. Romney and Mr. Gingrich were essentially tied among men, Mr. Romney had a 19-point lead among women in the Mason Dixon poll. In comparison, there is basically no gender gap in the Quinnipiac University poll taken over the weekend. Mr. Romney has a 13-point advantage among men and a 16-point edge among women. The statewide Quinnipiac telephone poll, conducted with 539 Republican likely primary voters, has a margin of sampling error of plus or minus four percentage points.