Bill de Blasio then took the stage and called Belafonte a “treasure to our nation.”

Via Capital New York:

At a church service with mayoral candidate Bill de Blasio on Sunday, Harry Belafonte, the singer and civil rights activist, denounced the conservative donors David and Charles Koch, calling them “white supremacists,” and likened them to the Ku Klux Klan.

“Already we have lost 14 states in this union to the most corrupt group of citizens I’ve ever known,” Belafonte told the crowd at the First Corinthian Baptist Church in Harlem. “They make up the heart and the thinking in the minds of those who would belong to the Ku Klux Klan. They are white supremacists. They are men of evil. They have names. They are flooding our country with money.

“They’ve come into to New York City,” Belafonte continued. “They are beginning to buy their way in to city politics. They are pouring money into Presbyterian Hospital to take over the medical care system. The Koch brothers, that’s their name.

“Their money is already seen into the fabric of our daily system and they must be stopped.”

De Blasio, who was seated in the pews for Belafonte’s remarks, then joined him on stage and praised the longtime activist.

“He is a treasure to our nation,” de Blasio said.