Former Vice President Joe Biden is leading Sen. Bernie Sanders by as many as 15 percentage points in two polls released Tuesday.

Biden got 33% support from likely Democratic voters, putting him 13 percentage points ahead of Sanders, who came in second with 20% support, an Emerson poll found.

Sen. Elizabeth Warren finished third with 14%.

Biden was also the top choice of 33% of voters in Morning Consult’s weekly survey, giving him a 15 percentage point edge over Sanders, who finished with 18% support.

Warren came in with 13% and Sen. Kamala Harris got 12% in the survey.

Finishing out the Democratic field, Mayor Pete Buttigieg got 5% and former Rep. Beto O’Rourke and Sen. Cory Booker both got 3%.

No other candidates received more than 2% support.

In the Emerson poll, Sanders gained 5 percentage points from the last survey, while Harris fell 4 points to 11%.

Only Buttigieg – 6% – and O’Rourke – 4% – got more than 3% of support.

The polls were released just as the second round of Democratic debates were to air Tuesday and Wednesday on CNN.