A new poll released Tuesday by Public Policy Polling finds President Trump in a dead heat with Facebook founder and CEO Mark Zuckerberg in a theoretical 2020 election showdown.

It's the first national poll of the two candidates in a head-to-head race.

When asked, "If the candidates for President next time were Democrat Mark Zuckerberg and Republican Donald Trump, who would you vote for?" the outcome of 836 registered voters' responses showed Trump and Zuckerberg receiving 40 percent support, with 20 percent responding "not sure."

The left-leaning group Public Policy Polling notes that Zuckerberg "is actually not a particularly well-known figure nationally," pointing to the 47 percent of voters polled who say they have no opinion about him. Twenty-four percent of respondents had a favorable view of Zuckerberg with 29 percent holding a negative view. The same poll found Trump to have a 55 percent unfavorable and 41 percent favorable rating.

Trump did not fare any better amongst any of the other potential Democratic candidates polled, losing head-to-head races with Sen. Corey Booker, D-N.J., 45 percent to 40 percent; Sen. Elizabeth Warren, D-Mass., 49 percent to 42 percent; Sen. Kamala Harris, D-Calif., 41 percent to 40 percent; Bernie Sanders, I-Vt., 52 percent to 39 percent; and former Vice President Joe Biden 54 percent to 39 percent.

Earlier this year Zuckerberg set out on a cross-country road trip to meet with Americans from every state in the U.S., which he documented on Facebook, fueling speculation he was gearing up for a presidential run. In May, Zuckerberg denied he was considering running for public office.