MSNBC’s Joe Scarborough Charles (Joe) Joseph ScarboroughScarborough calls on Cuomo to walk back statement he made about Trump: 'Out of bounds' Mika Brzezinski: 'Super grossed out' by Trump speech attendees 'who put their lives at risk' Democrats tear into Trump's 'deep state' tweet: His 'lies and recklessness' have 'killed people' MORE referred to Democratic presidential front-runner Joe Biden Joe BidenBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Joe Biden should enact critical government reforms if he wins MORE as "Teflon Joe" on Monday in analyzing a new poll showing the former vice president on top of the 2020 field, while pointing to Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE's (D-Mass.) continued "political bleeding."

“Once again, [it] had Joe Biden on top, and once again, and I will say this has been the biggest surprise for me over the past month, Elizabeth Warren continuing to drop, minus 8 [points],” Scarborough said on "Morning Joe."

“And I just sit and look at those numbers and say, 'Is she really losing all of this support because she put out a very progressive program?' " he asked, referring to Warren's "Medicare for All" plan, which included a proposed cost of $20.5 billion in new federal spending.

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"In the Democratic Party, I would not have expected this political bleeding to continue, but it does in just about every poll, and look at Teflon Joe. Teflon Joe just staying up there, Jack,” he added.

“Teflon Joe, Durable Joe ... call it what you want to call it, but he has weathered some storms, Joe, during this primary,” noted Adrienne Elrod, a spokeswoman for former Secretary of State Hillary Clinton Hillary Diane Rodham ClintonThe Memo: Trump furor stokes fears of unrest Bloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close MORE's 2016 presidential campaign. “And so far he’s stayed on top consistently."

"He’s also the only candidate in this race, I know we talked about this many times on the show, but he’s the only candidate running in the Democratic primary who can really attract a diverse electorate," she added.

The Fox News poll released Sunday showed 30 percent of Democratic voters and Democratic-leaning independents saying they support Biden, with Sen. Bernie Sanders Bernie SandersTrump, Biden will not shake hands at first debate due to COVID-19 Sanders tells Maher 'there will be a number of plans' to remove Trump if he loses Sirota reacts to report of harassment, doxing by Harris supporters MORE (I-Vt.) a close second at 20 percent. Warren only garnered 13 percent support, compared to 21 percent in the same poll last month.

#TeflonJoe stays strong, Jack. Elizabeth Warren’s drop is one of the most surprising Democratic developments over the past month. https://t.co/69kHoS5V5i — Joe Scarborough (@JoeNBC) December 15, 2019

Biden and Sanders, along with Warren, South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE (D), Sen. Amy Klobuchar Amy Klobuchar3 reasons why Biden is misreading the politics of court packing Social media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight MORE (D-Minn.), billionaire Tom Steyer Tom SteyerTV ads favored Biden 2-1 in past month Inslee calls Biden climate plan 'perfect for the moment' OVERNIGHT ENERGY: Trump administration finalizes plan to open up Alaska wildlife refuge to drilling | California finalizes fuel efficiency deal with five automakers, undercutting Trump | Democrats use vulnerable GOP senators to get rare win on environment MORE and entrepreneur Andrew Yang Andrew YangBiden's latest small business outreach is just ... awful Doctor who allegedly assaulted Evelyn Yang arrested on federal charges The Hill's Campaign Report: Biden weighs in on police shootings | Who's moderating the debates | Trump trails in post-convention polls MORE, will face off in the sixth Democratic presidential primary debate in Los Angeles on Thursday.