She's in that pack in more ways than one.
The conventional wisdom was that Kamala got a boost after the first debate, then she faded, all of sudden Warren got a boost, then Warren faded, all of a sudden Buttigieg got a boost, then he cooled down, then Klobuchar started seeing some gains. There's a group of voters out there that don't want Bernie or Biden and are hopping around but it's not giving them majorities.