A new poll indicates that Bernie Sanders has picked up some South Carolina Democratic voters who jumped ship from Hillary Clinton's campaign over the weekend.

The former secretary of state received 61 percent of likely primary voters' support in an American Research Group survey conducted Feb. 14-16. That's down from 65 percent, according to polling from after the Feb. 11 Democratic debate.

Sanders scooped up the four points Clinton lost, and that boosted him from last week's 27 percent to 31 percent.

But while Clinton is losing some ground among South Carolina Democrats, she still maintains a two-to-one lead over Sanders.

The Clinton-Sanders fight for the July nomination is much tighter in national polls. Recent surveys have put the two neck-in-neck, although many state-level polls still have Clinton with a healthy lead.

The Palmetto State primary for Democrats is set for Feb. 27.