Here's how Sanders did in the primary states on tap tomorrow against Hillary Clinton in 2016. Let's see how he does against Biden.

10 Mar 2016 2020
Idaho 78%
Michigan 48%
Missouri 49%
Mississippi 17%
North Dakota 64%
Washington 73%

If the polls are accurate, Sanders had a 20 point lead in Washington State a week ago, they now show a tie. Sanders was behind Biden in Missouri by 11, they show Biden has increased his lead to 20 points. Where Sanders was up by 11 in Michigan a week ago, it's Biden by 20 today. Of course the only poll that counts is to be taken tomorrow. No polling on Idaho, Mississippi or North Dakota.
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.