Susan Sarandon is the worst person on the list.
Most of the others are good. However, calling something the "People's Summit" is a bit Orwellian, as it suggests conservatives are not people. Further, holding more of these events will continue to erode Bernie's brand because he associates himself with far leftists who don't have the personal likability of himself (as a safe white-bread far leftist from a rural state). This was part of the problem with his Ellison endorsement as well.
Was William Jennings Bryan Orwellian for being a Populist?
