Joe Biden holds his big lead, and Kamala Harris slides: Here are the latest 2020 Democratic primary polls

Through all of the 2020 Democratic presidential primary’s early ups and downs, Joe Biden has consistently outpaced the field in polls. The former vice president has led nearly every survey at both the national and early nominating state level. His support dipped following the first Democratic debate in late June, then stabilized in recent weeks. Biden has so far shown staying power at the top of a jammed Democratic field even as his rivals’ polling numbers wax and wane. Sen. Kamala Harris, D-Calif., has seen her standing change most dramatically: she surged from fourth to second in the RealClearPolitics national polling average after a strong first debate showing, then dropped back to fourth.