Mr Mills said: “I think it is really rich for any Republican, especially a white man, to run around and claim that they care about the economic conditions of black communities and businesses.
“That is all a lie, there is nothing in their policies about that.”
Mr Bolling then erupted: “That is not fair, that is insulting and unfair.
“You don’t know me or who I am, that is just disgusting what you have just said.”
Ms Maitlis insisted Mr Bolling finish as listeners would not be able to hear both of them shouting.
Ms Mills continued: “I don’t work for the Biden administration and never have but what I am is a black person in America.
“Everything that these voting laws stand for and what they look like is reminiscent of the Jim Crow policies that my families lived under.
The BBC Newsnight host pleaded with Mr Bolling to stay for one more question.
He returned only to demand an apology from Ms Mills for her comments.
He added: “I don’t know why I am staying here.
“I need an apology, I need an apology.”
Ms Mills hit back and insisted she was not going to apologise for being offended.