Why is it mostly moderates calling for Biden to step aside, whereas the left wing mostly supports him continuing the race?

@ChipmunkErnie That’s what’s being reported, I just read it in an article in an article in New York Magazine; furthermore, the Squad is all behind Biden’s candidacy with AOC saying essentially Biden’s our candidate and that’s final. The congressmen asking Biden to step aside are mostly names I’ve never heard of (probably because they’re moderates from swing districts that haven’t been in Congress very long). One name I do recognize is moderate, Seth Moulton (D-MA). The first to speak up was Lloyd Doggett (D-TX), and you figure it’s probably only moderate Democrats that can win elections in southern states like Texas. Also, the congressman that ran against Biden in the primaries was moderate Representative Dean Phillips (D-MN).