Senator Bernie Sanders leads President Donald Trump by the widest margin of all the candidates in the Democratic Party's 2020 race when Americans are asked to choose in a face-off against the Republican incumbent, according to a poll.

SurveyUSA asked 4,069 registered voters nationwide how they would vote in an election today if Trump was pitted against each of the 2020 candidates in the Democratic race. The progressive Vermont independent came out on top.

The poll found that 52 percent of voters would choose Sanders and 43 percent Trump, giving the veteran senator a nine-point lead. Next was former vice president Joe Biden at 50 percent to Trump's 43 percent, a seven-point lead.

Michael Bloomberg, the media and financial data billionaire, also led Trump by seven points at 49 percent to 42 percent. Democratic Massachusetts Senator Elizabeth Warren leads Trump 48 percent to 45 percent, a three-point advantage.