Warren and Sanders will underperform this polls while Biden will definitely over perform it
Any reason why besides muh bad fit for the sunbelt? To clarify, I'm not suggesting this poll is accurate or doesn't have flaws, just questioning that assumption.
Sanders is a bad fit for the Rust Belt and Warren is just a bad fit period(She would do terribly in both the Sunbelt and Rust Belt).
The fact is the Sunbelt will not like Sanders/Warren position on trade which is even more protectionist than Trump , and will not like their position on Taxes.
On the other hand Biden is a great fit for both the Rust Belt and Sunbelt because he can appeal to both to WWC Voters and Upscale Suburbanites .
