Joe Biden continues to be a popular choice to run against President Donald Trump in 2020, according to early polling of Democratic voters.

In the U.S. Senate, where Biden served for more than 35 years, he’s not so popular.

But then, there’s a parade of likely presidential candidates in the august body with Hillary Clinton’s loss bringing about a break in the logjam.

A “senior Democratic aide” told The Hill that Biden’s support for the Iraq War and his two failed presidential bids are obstacles he’s not likely to overcome.

“It’s hard to see someone [winning] who voted for the Iraq war. People are looking to turn the page,” the aide said.

Another senior Democratic aide said “polls show that voters want someone who is new,” and with Biden about to turn 76, one thing he isn’t is new.

Aside from Sen. Bernie Sanders, the 76-year-old independent from Vermont, the list of prospective Democratic presidential candidates include Sens. Elizabeth Warren, Mass., Cory Booker, N.Y., Kirsten Gillibrand, N.Y., and Kamala Harris, Calif.

Meaning there are no shortage of “senior aides” willing to throw shade at Biden.

One Democratic senator willing to speak under the cloak of anonymity told The Hill that “polls this early don’t mean anything.”

The lawmaker said a Politico/Morning Consult survey recently published had Biden leading Trump 44 percent to 37 percent among registered voters, but the results did not much since it didn’t poll other candidates against Trump.

An interested prospect is that if Biden decides to run, where will Barack Obama, who called Biden his “brother from another mother” in response to a birthday wish, fall in the race?

A Biden run would be worth it just for the predicament it would put Obama in.

With New York Democratic congressional nominee Alexandria Ocasio-Cortez, a self avowed democratic socialist, being held up as the darling of the party, there question may be is Biden “progressive” enough for the increasingly far-left base.