In a national trial heat against Trump, Biden led 50 percent to 41 percent among registered voters. In key battleground states — Michigan, New Hampshire, Wisconsin, Pennsylvania, Florida, Minnesota, Nevada, Maine, North Carolina, and Arizona — Biden carries 50 percent of the vote compared to 43 percent for Trump.

Vermont Senator Bernie Sanders — the national frontrunner — beats Trump in the national head-to-head contest (48% to 42%), but falls within the three-point margin of error in key battleground states (48% to 45%). In a sign of his political strength among young Americans, Sanders carries a 25-point lead over Trump among 18-to 29-year-olds in the trial heat. He boasts a 16-point lead among 30-to 44-year olds.