Bernie is definitely making headway, but according to RCP, Biden’s lead is greater than Sanders’s in MI, PA, and WI as of the most recent polls reported.

The matter is not free from doubt, and people who argue that Biden is more electable are not just making shit up “in bad faith,” which you seem to feel obliged to say or imply at every opportunity. Being a self-styled radical does not oblige you to call everyone who disagrees with you an asshole. Sometimes a cigar is just a cigar, and a disagreement is just a disagreement.