How much stock to put into them since they still include Buttigieg, Bloomberg, Warren, Klobuchar etc. is up to you.
Other 10 Mar polling, since 4 Mar to this AM, 7 Mar in Missouri Biden increased lead over Sanders from 12 to 20 points. But in my opinion the worst news for Sanders is on the west coast, the very progressive state of Washington where over the same time period 4-7 Mar, Biden has cut a 20 point Sanders lead down to 6. With no data on North Dakota, Idaho or Mississippi, the remainder of the 10 Mar Primaries, it looks like Sanders might just win one state, Washington. Even there, it looks like a very close thing.
It's high past time that we start electing Americans to congress and the presidency who put America first instead of their political party. For way too long we have been electing Republicans and Democrats who happen to be Americans instead of Americans who happen to be Republicans and Democrats.