Mike Erlandson, a former chairman of the Minnesota Democratic-Farmer Labor Party, said he watched with his 15-year-old daughter in Minnesota this week as a man spray-painted on a wall, “F--k the white people from the suburbs.” “I do think that, particularly if this continues, the [congressional] districts like Dean Phillips’ district or Angie Craig’s district that right now I would say are relatively safe for the Democratic incumbent, could be very much in play,” he said. “Both of those districts will be decided in large part by suburban women voters, and it would be hard for me to imagine those...