Also important:
Wisconsin and Kansas both exemplify something PPP has found repeatedly in its general election polling- almost all of the undecideds are Democratic leaning voters who hate Trump but either support Biden and are reluctant to vote for Sanders in the general or support Sanders and are reluctant to vote for Biden in the general.
In Wisconsin the undecideds in Biden/Trump give Trump a 7-69 approval rating and support Sanders 52/11. If they ended up voting based on their Trump approval Biden would be ahead by 7 and if they voted the same way they did in the match up with Sanders, Biden would be ahead by 6. The undecideds in Sanders/Trump give Trump at 7-67 approval rating and support Biden 61/5. If they ended up voting based on their Trump approval Sanders would be ahead by 6 and if they voted the same way they did in the match up with Biden, Sanders would also be ahead by 6. With a little more party unity the race in Wisconsin wouldn’t even be terribly close and Trump’s path to reelection would be just about closed.
Yeah, I have been saying this all along. If Democrats stick together and get out the vote, then we win and we win easily. There are simply more of us than there are of them. They win by having better turnout, having an electoral system that favours them and by actively using voter suppression.