The shift returns Biden to a double-digit lead over his nearest competitors, Vermont Sen. Bernie Sanders at 15% and Massachusetts Sen. Elizabeth Warren at 14%. Their support is largely unchanged since earlier this summer.

Aside from Biden’s increase, the only statistically meaningful change in the candidate standings is a 12-point decline in support for California Sen. Kamala Harris, who stood at 17% support in the June poll but now has the backing of 5% of potential Democratic voters. That’s similar to the level of support she had in the spring before a surge following her initial debate performance.