Bernie Sanders and Elizabeth Warren have surged to tie with Joe Biden atop the list of Democratic presidential contenders, according to a poll that suggests the three are solidifying their status as the top tier in the massive field.
The Monmouth University poll, released this week, shows Sanders and Warren deadlocked among Democratic voters at 20 percent, with Biden a point behind, at 19 percent.
No other candidate had support in the double digits.
Compared with the Monmouth poll in June, Sanders has ticked up 6 points, and Warren 5 points. Biden dropped 13 points, from 32 percent in June.