The statement concluded, “It’s time to move on and everyone wishes Flavor well.”

Flavor Flav and Chuck D formed Public Enemy in 1982; Public Enemy Radio is an offshoot of the original group led by Chuck D. That group toured in Europe with the Wu-Tang Clan in May 2019 without Flavor Flav, and said it has also done benefit shows without him.

On Sunday, Chuck D, whose real name is Carlton Ridenhour, addressed the episode by saying on Twitter, “it’s not about Bernie with Flav … he don’t know the difference between Barry Sanders or Bernie Sanders.” (During the 2016 general election, Flavor Flav said, “I would never want to take sides in this thing” to avoid alienating any fans. In 2018, he called President Trump the “most destructive president in United States history.”)

In a separate post early Monday morning, Chuck D said that he had appeared at the Sanders rally on Sunday night. He added that if a “$bag,” or payment, had been involved, “Flav would’ve been there front & center.” His former partner, he added, “will NOT do free benefit shows.”

The rally drew thousands to the Los Angeles Convention Center on Sunday and featured Chuck D and his crew performing a set of Public Enemy material that included “Bring the Noise,” “Black Steel in the Hour of Chaos” and “Fight the Power,” according to The Los Angeles Times. Also appearing at the event held ahead of Super Tuesday were the comedian Sarah Silverman and the actor Dick Van Dyke.

On Twitter, Chuck D said that he had built the group Public Enemy Radio to perform Public Enemy’s material at “benefits & fundraisers.” Flavor Flav’s “refusal to do” Many Rivers to Cross, a music and arts festival organized by Mr. Belafonte “was my last time,” he said. “I built Enemy Radio to get far away from that ridiculousness.”

Chuck D also said that Flavor Flav had sued him on Friday. It was not clear whether Chuck D was referring to the cease-and-desist letter, or whether a lawsuit had been filed. On Twitter, Flavor Flav said he had not filed any suit, and that he had only asked the Sanders campaign “to correct misleading marketing.”

This is not the first legal feud between the two artists. In 2017, Flavor Flav sued Chuck D, alleging that he had not been paid all the royalties he was owed. Flavor Flav also accused Chuck D of using Flavor Flav’s voice on an album that was released that year and included his image on its cover, both without authorization.

