Another very bad argument for Sanders-Warren "unity"

I have a broader article about the Sander-Warren “unity” discourse on the way, but here I want to make a narrow point. Sam Adler-Bell, with a rationale for keeping Warren in the race:

According to Morning Consult, Biden is the second choice of the most Buttigieg supporters, at 27 percent, followed by Warren at 20 and Sanders at 12 percent. So if both War…