Tampa, Florida (CNN) - On the eve of the Sunshine State's Republican presidential primary, a fourth straight poll indicates Mitt Romney holding a double-digit lead over Newt Gingrich.
According to a Quinnipiac University survey released Monday, 43% of people likely to vote in Tuesday's GOP contest say they are backing the former Massachusetts governor, with 29% supporting the former House speaker.
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The poll indicates 11% are backing Rep. Ron Paul of Texas and an equal amount are supporting former Sen. Rick Santorum of Pennsylvania. Seven percent of people questioned say they are undecided, with 24% indicating they could change their minds.
The Quinnipiac poll was conducted Friday through Sunday, after Thursday night's CNN/Republican Party of Florida GOP debate in Jacksonville, which was the final showdown between the candidates before the primary.
Romney also held an 11-point lead over Gingrich in an American Research Group survey, released Sunday, which was also conducted entirely after the debate. And he held a 15-point lead in an NBC News/Marist poll that was conducted Wednesday through Friday of last week, and an 11-point advantage in a Tampa Bay Times/Miami Herald/Bay News 9 survey that was conducted Tuesday through Thursday of last week.
Romney's 14-point lead in the new Quinnipiac poll is up from a 9-point advantage he held in a Quinnipiac poll released on Friday. Romney is making his second bid for the GOP nomination.
In the new survey, Romney holds a 40%-31% advantage over Gingrich among self-described conservatives, a 38%-33% margin over Gingrich among white evangelical Christians, and a 40%-35% margin over the former House speaker among tea party movement supporters. All three groups are part of Gingrich's strongest supporters.
"Gov. Mitt Romney is headed towards a double-digit victory that touches all the GOP bases," said Peter A. Brown, assistant director of the Quinnipiac University Polling Institute. "Romney carries every part of the GOP coalition, including the parts central to Gingrich – self-described conservatives, white evangelical Christians and Tea Party supporters. If this margin holds up tomorrow, it's hard to see where Gingrich goes from here."
The Quinnipiac University poll was conducted January 27-29, with 539 likely Republican primary voters in Florida questioned by telephone. The survey's sampling error is plus or minus 4.2 percentage points.
– Follow Paul Steinhauser on Twitter: @PSteinhauserCNN