Former Vice President Joe Biden Joe BidenThe Memo: Warning signs flash for Trump on debates Senate Republicans signal openness to working with Biden National postal mail handlers union endorses Biden MORE surged to the top of the 2020 Democratic presidential field after former candidates Pete Buttigieg Pete ButtigiegBogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq A socially and environmentally just way to fight climate change MORE and Sen. Amy Klobuchar Amy KlobucharEPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates Biden marks anniversary of the Violence Against Women Act, knocks Trump and McConnell MORE (D-Minn.) ended their campaigns, a poll released on Tuesday found.

The Morning Consult poll released on the day of Super Tuesday primaries in 14 states shows Biden leading with 36 percent support nationally.

The former vice president had 26 percent in Sunday’s poll, which was taken after he won the South Carolina primary but before Buttigieg and Klobuchar left the race.

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Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE (I-Vt.), who has the most delegates after four contests, sits at 28 percent in the new poll, with no significant change from Sunday. Former New York City Mayor Mike Bloomberg follows with 19 percent and Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE (D-Mass.) has 14 percent.

Biden now has the most nationwide support since June.

The former vice president jumped in the poll after Klobuchar and Buttigieg, the former mayor of South Bend, Ind., endorsed him to combine the previously split moderate Democratic vote. The three candidates all positioned themselves as alternatives to Sanders, who describes himself as a democratic socialist. Former presidential candidate and Rep. Beto O’Rourke (D-Texas) also endorsed Biden on Monday.

Sanders has led the Democratic primary race, winning contests in New Hampshire and Nevada. The senator has 60 delegates, compared to Biden's 54.

More than a third of the total delegates are at stake on Super Tuesday.

The Morning Consult poll surveyed 961 Democratic voters between Monday at 3 p.m. and Tuesday at 9:30 a.m. It has a margin of error of 4 percentage points.

Other polls ahead of the races show Biden gaining significant ground after South Carolina’s primary and with support from moderates who want to don't want Sanders to be the Democratic Party's presidential nominee.