MSNBC analyst Steve Kornacki said that the floor is "pretty much falling out" for presidential hopeful Joe Biden after a new poll was released Monday morning. The poll shows Biden losing ground across the board among Democratic voters, with more supporters flocking to more liberal candidates.
Kornacki analyzed a new Monmouth poll, which showed the former vice president losing support among Democratic voters, putting him in a virtual three-way tie for first place with Sens. Elizabeth Warren (D., Mass.) and Bernie Sanders (I., Vt.). The poll shows Sanders and Warren both at 20 percent and Biden at 19 percent. The poll shows Sen. Kamala Harris (D., Calif.) in fourth place, at a significantly lower 8 percent.
"Now, the question it raises: What will other polls show? Will they replicate what we're seeing here in Monmouth? Will this prove to be an outlier?" Kornacki said. "That's a question going forward."
"But when you look inside these numbers, you see some reasons why Biden's in particular trouble here," he continued. "Number one, it's ideological. Among liberal voters, Warren, not surprisingly, in first, Sanders right behind her in second."
Compared to another Monmouth poll taken in June, Biden slipped from 24 percent support to 15 percent support among liberal voters. Warren lost only one point from liberal supporters, coming in at 24 percent. Sanders gained some ground, moving from 17 percent to 21 percent.
"When you look at moderate conservative voters, this has been the strong base of support ideologically for Biden," Kornacki said. "He still leads, but he's running in this poll at least only 22 percent among self-described moderates and conservatives."
Biden's support among moderate voters has plummeted from 40 percent to 22 percent since June, according to the poll. Both Sanders and Warren gained 10 points, and now sit at 20 percent and 16 percent among moderate voters, respectively.
Kornacki also broke down the age divide among Democratic voters: Thirty-three percent of voters over 50 years old support Biden, a decrease of 9 percent from June. Biden is doing even worse among voters aged 18-49, however, with just 6 percent support, according to the poll. With that younger set, Sanders is leading with 27 percent and Warren is in second place with 19 percent. Harris, who has 12 percent support, is still above Biden, who is tied with businessman Andrew Yang in fourth place.
"For Biden, ideologically not getting what he normally gets from moderates, from conservatives in this poll," Kornacki added. "And age-wise, we're used to seeing him not do too well among folks under 50, but the floor pretty much falling out for him, at least again in this poll."