According to Vox.com, the top tier of the 2020 presidential race is "incredibly fluid." The top tier of the race is Elizabeth Warren, Bernie Sanders, Joe Biden, and Pete Buttigieg.
No one in a clear position to win the nomination.
Veteran Iowa pollster Ann Selzer told Vox that the fluidity of the top tier is a reflection of indecisiveness.
Adding to the mix are the dozen or so other candidates.
Kamala Harris refuses to go away, even though her polls are sinking and her campaign is in chaos.