Former Secretary of State Hillary ClintonHillary Diane Rodham ClintonWhite House would like to see Biden ‘in the boxing ring’ in 2020 House Judiciary chair subpoenas DOJ for FBI documents The suit to make Electoral College more ‘fair’ could make it worse 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.

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 WarrenWarren battles Carson: Housing discrimination 'the scandal that should get you fired' Overnight Regulation: Omnibus includes deal on tip-pooling rule | Groups sue over rules for organic livestock | AT&T, DOJ make opening arguments in merger trial Warren presses Mulvaney, Azar on tip pooling 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 Davis RyanHouse Republicans grumble about the 'worst process ever' Winners and losers from the .3T omnibus Collins: McConnell has 'kept his commitment' on ObamaCare fix MORE (R-Wis.) at 16 percent. Ryan was the Republican vice presidential candidate in 2012.

Sen. Rand PaulRandal (Rand) Howard PaulSenate approves .3 trillion spending bill, sending to Trump GOP senator threatened to hold up bill over provision to honor late political rival: report Conservatives balk over funding bill ahead of shutdown  MORE (R-Ky.) came in third at 13 percent, followed by former Florida Gov. Jeb Bush (R) at 10 percent, Sen. Marco RubioMarco Antonio RubioTrump replaces McMaster with Bolton as national security adviser Orlando March for Our Lives protesters to march to Rubio's downtown office, Pulse nightclub Lawmakers eye crackdown on China’s Confucius Institutes MORE (R-Fla.) at 9 percent, Sen. Ted CruzRafael (Ted) Edward CruzConservatives balk over funding bill ahead of shutdown  Confirmation fight over Trump pick exposes blurred lines in GOP-LGBT activism GOP pushes to change Senate rules for Trump 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.