Here's who Democrats want to run against Trump in 2020

The Democratic Party suffered an absolutely devastating blow to its left-wing agenda with the 2012 election, but party members are already looking at candidates for 2020 — and their favorites might surprise you.

Public Policy Polling reported Tuesday that Democrats have "mixed feelings" about who they'll run in 2020, but there are two standouts: 70-year old Vermont Sen. Bernie Sanders and 74-year-old Vice President Joe Biden:

Joe Biden leads the way for Democrats with 31% to 24% for Bernie Sanders, and 16% for Elizabeth Warren. They're the only folks we tested with meaningful support for the nomination at this point. Cory Booker gets 4%, Al Franken and Kirsten Gillibrand each get 3%, Sherrod Brown and Andrew Cuomo each get 2%, and Julian Castro gets less than 1%.

Warren, who is currently a spry 67 years, is the youngest of the trio at the top.

What's even more interesting is that the specific candidates Democrats prefer go against the age preferences they have for their next candidate:

57% of Democrats say they want their candidate to be under the age of 60, and 77% say they want their candidate to be under the age of 70. Only 8% actually want a candidate who's in their 70s, with another 15% expressing no opinion in regards to the age of their candidate.

This poll belies their biggest political challenge — the lack of depth in the bench of available candidates with any sort of name recognition. This is yet another reason the 2012 election was so devastating and why liberals are lamenting so loudly.

On the other hand, four years is a long time in politics. Hardly anyone in 2004 would have predicted that someone named "Barack Obama" would wrest the nomination from Hillary Clinton four years later and then occupy the Oval Office for eight years.

The survey included 400 Democratic primary voters with a margin of error of +/- 4.9 percent.