Biden is still way ahead. Warren and Bootyjudge seem to have plateaued in favor of Sanders who seems to be gaining very slowly.
Nearly everyone has flatlined. Bloomberg got a blip recently, Sanders is egging on, Biden's ups and downs are being equalized.... Biden at around 30%, Bernie right behind at 20.
These campaigns need to add some spice, mix up a few words, take a gamble. Did something in particular happen? Buttigeg frizzled out because he was what - to 'mainline liberal'? Dunno what happened to Waren.