Washington (CNN) - Who should Mitt Romney choose as his running mate?
According to a new national poll, there's no consensus among Republicans. But a CNN/ORC International survey released Wednesday does indicate there's an ideological split that could put pressure on Romney, the all but certain GOP presidential nominee, as he tries to make his decision.
The poll asked Republicans and independents who lean towards the GOP to choose from eight names who could be among the two dozen or so potential running mates that the Romney campaign may be considering as the vice presidential nominee.
According to the survey, Condoleezza Rice is on top of the list. Twenty-six percent questioned said they would like to see Rice, who served as national security adviser and later as secretary of state under President George W. Bush, as the Republican vice presidential nominee. In second place in the survey, at 21%, was Rick Santorum, who was Romney's chief rival for the nomination until early last week, when the former senator from Pennsylvania suspended his campaign for the White House.
Sen. Marco Rubio of Florida and New Jersey Gov. Chris Christie were each at 14%, with House Budget Chairman Paul Ryan of Wisconsin at 8%, Louisiana Gov. Bobby Jindal at 5%, Virginia Gov. Bob McDonnell at 1% and Sen. Rob Portman of Ohio at less than one half of one percent.
"Name recognition is the key," says CNN Polling Director Keating Holland. "Rice and Santorum are best known and they top the overall wish list."
But split out self-described supporters of the tea party movement and a different picture emerges.
The poll indicates that Rubio, at 22%, and Christie, at 18%, top the list of tea party supporters, with Rice and Santorum dropping into a tie for third place.
According to the survey, among Republicans who say they aren't supporters of the tea party, 36% say Rice is their choice to be Romney's running mate, with one in four saying they'd like Santorum as the GOP vice presidential nominee. Christie barely cracks double digits and Rubio is in single digits among non tea party supporters.
Why don't Rubio and Christie do better among non tea party supporters?
"Once again, it's all a matter of name recognition," says Holland. "Two-thirds of tea party Republicans are familiar with Rubio and virtually all of them have a favorable view of him; six in ten Republicans who do not support the tea party have little or no idea who Rubio is. Christie's numbers among tea party supporters are even higher - three-quarters of them have a favorable view of the New Jersey governor and only one in five are unfamiliar with him; nearly six in ten Republicans who don't support the tea party don't have an opinion of Christie."
The poll indicates that the other names on the list, such as Jindal, McDonnell, and Portman, are unknown quantities to tea party supporters and other Republicans alike. It goes without saying, however, that the presidential nominee is unlikely to put his running-mate choice to a vote, so Romney's opinion is probably the only one that will count in the end.
The CNN poll was conducted by ORC International from April 13-15, with 473 Republicans and independents who lean towards the GOP questioned by telephone. The survey's overall sampling error is plus or minus 4.5 percentage points.