The Democratic presidential race moves to South Carolina on Saturday, where Hillary Clinton is hoping to expand her winning streak against rival Sen. Bernie Sanders.

Multiple polls show Clinton with a dominant lead going into the first-in-the-South contest. 

Clinton played up her allegiance to President Obama at a rally Thursday, and pledged to continue fighting for tougher gun laws -- an argument that resonates with black voters wielding influence in Saturday’s primary. 

"I'm really proud to stand with President Obama, and I'm really proud to stand with the progress he's made," she said in Kingstree, South Carolina. "I need your help, starting with this primary on Saturday."

Clinton also pledged to “take on the gun lobby” in office, and slammed Sanders for having voted against some gun restrictions during his congressional career.

"We need to close the gun show loophole, the online loophole and what is called the Charleston loophole, which my opponent supported, which means that at the end of three days, whether the background check is done or not you get the gun," Clinton said.

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"That's what the killer here in Charleston did."

Sanders spent Thursday making stops in the Great Lakes region – visiting several states that hold early March primaries.

The Associated Press contributed to this report.