West is really bad for Biden. Jill Stein was basically unknown. Cornell West has been in the media for a long time. Forget Biden's +4.5% margin. The real margin of victory was .63% (the difference between Biden and Trump in WI). It was .31% in AZ and .24% in GA. If Trump does 1% better nationally he almost certainly wins the election. The Green Party got .26% in 2020. With somebody like West at the top of the ticket (and people disapproving of both parties) I wouldn't be shocked if they could pull in 1%+ (mostly at Biden's expense).