Sen. Bernie SandersBernard (Bernie) SandersSenate to vote Monday on Trump's VA nominee Senate approves resolution warning Trump not to hand over US officials GOP leader blocks resolution backing intelligence community on Russia MORE (I-Vt.) is up by double-digits on former secretary of State Hillary ClintonHillary Diane Rodham ClintonProminent Putin critic: If Trump turns me over, I'm dead Dems unveil slate of measures to ratchet up pressure on Russia Trump tweets old video of Clinton talking up 'a strong Russia' MORE in Iowa and New Hampshire, according to a poll released by CBS News on Sunday.

The senator is drawing 43 percent support in the first-in-the-nation Iowa caucus, besting Clinton by 10 points.

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Sanders is also drawing 52 percent support in New Hampshire, almost doubling Clinton, who sits at 30 percent support in the Granite State.

Clinton, however, doubles-up Sanders in South Carolina, drawing 46 percent compared to the senator’s 23 percent.

Vice President Biden, who is considering a run for the Democratic presidential nomination, places third in all three states, drawing 10 percent support in Iowa, 9 percent support in New Hampshire, and a strong 22 percent backing in South Carolina.

The YouGov/CBS News 2016 Battleground Tracker poll, conducted Sept. 3 – 10, surveyed 548 likely Democratic primary voters in New Hampshire, 528 in South Carolina, and 646 in Iowa. The margin of error for the poll is 5 percent.