The rap group Public Enemy said it was “moving forward” without Flavor Flav after he raised objections that Senator Bernie Sanders’s presidential campaign had made it appear as if the group was backing his candidacy.

A lawyer representing Flavor Flav, the flamboyant, clock-wearing rapper who had his own reality series on VH1 and whose real name is William Drayton, sent a cease-and-desist letter to the Sanders campaign on Friday. The letter objected to what the lawyer said was the unauthorized use of Flavor Flav’s likeness and trademarked clock image to promote a rally on Sunday with Public Enemy in Los Angeles.