Biden tops Warren by 21 points in South Carolina — 37% of likely voters back the former vice president, 16% Warren and 11% Sanders. In Nevada, there is no clear leader, with Biden and Sanders tied at 22% of likely caucusgoers with 18% for Warren, all within the poll’s margin of sampling error. In neither state does any other candidate reach double-digits.

Biden’s strong standing in South Carolina rests on support from black voters. Overall, 45% of black likely primary voters back Biden, more than 30 points ahead of his closest competitor. Among white likely primary voters, however, Biden and Warren are deadlocked: 29% favor Biden, 28% Warren.

Nevada’s three-way race rests on the demographic and political divides that are driving the contest nationwide. Liberal likely caucusgoers break heavily for Sanders, while moderate and conservative caucusgoers give Biden a wide edge. Those under age 50 break toward Sanders: 35% for him vs. 13% for Warren and 12% for Biden. Among those over 50, 32% back Biden, 23% Warren and 11% Sanders. Voters with college degrees are more in Warren’s corner, while those without degrees split between Sanders and Biden with Warren lagging behind.