Hillary Clinton has established a wide lead among likely Democratic voters in South Carolina, according to new poll released by Winthrop University.

Clinton received 71 percent of Democrats’ support, while Sen. Bernie Sanders (I-VT) received 15 percent and former Maryland Gov. Martin O’Malley received 2 percent.

In a September poll conducted by CBS/You Gov found Clinton with a smaller lead of just 23 points over Sanders.

Winthrop surveyed 832 South Carolina voters likely to vote in the Democratic primary via phone Oct. 24-Nov. 1 with a margin of error plus or minus 3.4 percentage points.