If you want to bolster the ticket, get someone that people already like. Hell, get Obama or Sanders to come back as the VP.
If you want to bolster the ticket, get someone that people already like. Hell, get Obama or Sanders to come back as the VP.
Sanders could, but I think he has the double issue of his two prior failed campaigns - a lot of his more motivated voters from previous times might have a "boy who cried wolf" reaction a third campaign. He also doesn't really disarm the "too old" criticism, even if all evidence points to him aging a lot better than either Biden or Trump so far - Biden 2020 vs Biden 2024 would give a lot of people pause even if Sanders gave the world's best debate performance at this point.
There's also the fact that Sanders has been actually pretty influential in Biden's presidency, which I think is why he came out so strongly in favour of Biden a few days ago.
Same with (partial) student debt relief, and you see shadows of the Green New Deal in the Inflation Reduction Act.