Project Veritas has undercover video of DNC operatives saying that they have kooks on file, ready to use when needed.
I think this was in the Washington Times in 2016
Mr. O’Keefe said the investigation reveals “compelling evidence of a dark-money conspiracy” and that he would continue to release videos as part of a series titled “Rigging the Election” until voters go to the polls on Nov. 8.
The first video shows Democratic strategists discussing how they hire agitators — including union members, homeless people and the mentally ill — to incite violence by provoking Trump supporters on camera at campaign stop