Headline:🚨WARREN up from 12% to 18% after the first debate.🚨
Most of that support comes from BIDEN and undecided.
Some big caveats in the next tweet.
projects.fivethirtyeight.com/democratic-deb…
There is likely some selection bias in the voters who have already responded to the survey, i.e. toward liberals/Warren voters who thought she had a big night and may have been more eager to respond.
And obviously.... there's another debate tonight.