Poll: Biden has 18-point lead on Democratic field, Sanders only other contender in double digits

Former Vice President Joe BidenJoe BidenNew York Times editorial board calls for Trump's impeachment Graham invites Giuliani to testify about recent Ukraine trip Booker leads other 2020 Dems in petition urging DNC to change debate qualifications MORE leads his nearest presidential primary contender by 18 points, further solidifying his status as the crowded field’s front-runner, according to a poll released Tuesday.

A Morning Consult poll shows Biden with the support of 38 percent of Democratic primary voters, beating out Sen. Bernie SandersBernie SandersSanders 'outraged' after MLB threatens to cut ties with minor league teams Booker leads other 2020 Dems in petition urging DNC to change debate qualifications Democrats threaten to skip next debate over labor dispute MORE (I-Vt.), his nearest competitor, who was supported by 20 percent of the respondents.

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Biden and Sanders are the only two candidates who had support in the double-digits. They are followed by Sen. Elizabeth WarrenElizabeth Ann WarrenTrump executive order aimed at combating anti-Semitism stirs up controversy Booker leads other 2020 Dems in petition urging DNC to change debate qualifications Democrats threaten to skip next debate over labor dispute MORE (D-Mass.) with 9 percent, South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegBooker leads other 2020 Dems in petition urging DNC to change debate qualifications Buttigieg rolls out endorsements from South Bend officials Democrats threaten to skip next debate over labor dispute MORE (D) and Sen. Kamala HarrisKamala Devi HarrisBooker leads other 2020 Dems in petition urging DNC to change debate qualifications Sanders revokes congressional endorsement for Young Turks founder Cenk Uygur The Hill's Campaign Report: 2020 Democrats trading jabs ahead of Los Angeles debate MORE (D-Calif.) with 7 percent, and former Rep. Beto O’Rourke (D-Texas) with 4 percent.

The former vice president’s support extends to 42 percent over the primary field when narrowing the survey to primary voters in early states, which Morning Consult said included Iowa, New Hampshire, South Carolina or Nevada. Sanders remains at 20 percent among such voters. 

Biden and Sanders have emerged as the crowded field’s top two candidates, setting up what could be a prolonged fight between the party’s centrist and progressive flanks. However, when asked who their second choice would be if their chosen nominee failed to win the nomination, Biden supporters chose Sanders and Sanders supporters chose Biden. 

The two candidates also have the highest favorability ratings among all their opponents, with Biden garnering a 76 percent approval rating and Sanders getting a 74 percent approval rating.

Biden has enjoyed a surge of support since announcing his White House bid in April, topping every national poll since his launch, largely appearing to be at the expense of support for Sanders.

The Morning Consult poll surveyed 16,368 registered voters who indicate they may vote in their state’s Democratic primary or caucus from May 20 to 26 and has a margin of error of plus or minus 1 percentage point. It also interviewed 626 voters in Iowa, New Hampshire, South Carolina or Nevada during that same time frame and has a margin of error of plus or minus 4 percentage points for that subset.