Former Secretary of State Hillary ClintonHillary Diane Rodham ClintonBiden slams Trump over golf gif hitting Clinton Overnight Cybersecurity: Equifax hit by earlier hack | What to know about Kaspersky controversy | Officials review EU-US privacy pact Overnight Tech: Equifax hit by earlier undisclosed hack | Facebook takes heat over Russian ads | Alt-right Twitter rival may lose domain MORE (D) remains the clear front-runner for the Democratic presidential nomination in 2016, while New Jersey Gov. Chris Christie (R) narrowly leads a packed field of GOP contenders, according to a CNN-ORC poll released Monday.

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According to the survey, 65 percent of Democrats or liberal-leaning independents say they would back Clinton for the presidential nomination. Vice President Biden came in a distant second at 10 percent, followed by Sen. Elizabeth WarrenElizabeth Ann WarrenSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Trump bets base will stick with him on immigration Dems call for action against Cassidy-Graham ObamaCare repeal MORE (D-Mass.) at 7 percent, New York Gov. Andrew Cuomo at 6 percent and Maryland Gov. Martin O’Malley at 2 percent.

Biden headlined a high-profile Democratic fundraiser in the early caucus state of Iowa on Sunday, and political watchers are debating whether the vice president would challenge Clinton in the Democratic primary if she were to decide to run.

The Republican field is far more crowded. Christie leads at 17 percent, just edging Rep. Paul RyanPaul RyanRyan: Graham-Cassidy 'best, last chance' to repeal ObamaCare Ryan: Americans want to see Trump talking with Dem leaders Overnight Finance: CBO to release limited analysis of ObamaCare repeal bill | DOJ investigates Equifax stock sales | House weighs tougher rules for banks dealing with North Korea MORE (R-Wis.) at 16 percent. Ryan was the Republican vice presidential candidate in 2012.

Sen. Rand PaulRandal (Rand) Howard PaulSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Lawmakers grapple with warrantless wiretapping program MORE (R-Ky.) came in third at 13 percent, followed by former Florida Gov. Jeb Bush (R) at 10 percent, Sen. Marco RubioMarco Antonio RubioOvernight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions Senate passes 0B defense bill Trump bets base will stick with him on immigration MORE (R-Fla.) at 9 percent, Sen. Ted CruzRafael (Ted) Edward CruzSenate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Finance: CBO to release limited analysis of ObamaCare repeal bill | DOJ investigates Equifax stock sales | House weighs tougher rules for banks dealing with North Korea GOP state lawmakers meet to plan possible constitutional convention MORE (R-Texas) at 7 percent and former Sen. Rick Santorum (R-Pa.) at 5 percent. Santorum was the foremost challenger to Mitt Romney for the 2012 Republican presidential nomination.

Clinton and Christie are two of the most popular political figures in the country, and both routinely register strong favorability ratings in public opinion polls. One Quinnipiac University poll from last month showed Clinton edging Christie 46 to 40 in a head-to-head match-up.

None of the potential candidates have publicly committed to a 2016 run. However, Ready for Hillary, a super-PAC pushing the former New York senator to run, is loaded with former Obama campaign activists.

The CNN-ORC poll of 1,022 adults was conducted between Sept. 6 and Sept. 8 and has a 4.5-percentage-point margin of error.