U.S. President Donald Trump has fallen behind leading Democrats in polls matching up potential candidates for the 2020 U.S. presidential election.

The poll, conducted by Politico/Morning Consult showed that as of Wednesday, Trump was lagging behind Joe Biden, the former vice president, and Vermont Senator, Bernie Sanders. He lagged behind them by 12 points each.

Trump also lagged four points behind Massachusetts Senator, Elizabeth Warren.

The poll contacted 1,974 registered voters between the 16th and 18th of August. There poll claims a margin of error of two points.

Trump fared better against lesser known candidates who are also potential Democrat nominees, such as Senators Corey Brooker (NJ), Kirsten Gillibrand (NY) and Kamala Harris (CA).

Against the lesser-known candidates won the match up by up to 10 points.

However, what was more telling was that Trump did not secure more than 30% support in any of the potential presidential runs, meaning that a large amount of voters would be undecided in the case of a match-up between Trump and a lesser known Democrat candidate.

Tyler Sinclair, the head of the poll at Morning Consult, said that this showed a strong advantage for Sanders and Biden, the two most likely candidates for the Democratic nomination, reports the Hill.

“Democrats are showing an enthusiasm gap in likely 2020 candidates, with Sanders and Biden outpacing other potential nominees,” he said.

“Our polling shows 74 [percent] and 73 percent of Democrats say they would vote for Sanders and Biden over Trump, respectively. This exceeds Warren [60 percent], Booker [49 percent], and Harris [47 percent]."

In polls for the upcoming mid-terms, Democrats are also slated to perform better than Republicans.

A Thomson-Reuters poll, which has been updated weekly between March 1 and August 9, shows that Democrats lead 43.2% to the Republicans who poll at 37.2% on a generic Congression ballot.

The poll collated 2,014 responses in the week ending on August 5.