Don't know about the other states, but I know for a fact at least 99% of NC early vote was casted before a single SC result or exit poll was released. So much of the vote tommorow was casted before these last few days, which is why getting off to a slow start could hurt Biden. He needs a big election day vote. The problem? Election day vote across the country skews younger than the early vote. I don't know how to call it. Bernie has built in advantages that are being understated, while Biden appears to have momentum.