Not at all, as far as I'm concerned. For example, Joe Biden once talking about black students, remarked that they were just as intelligent as people who weren't poor. Biden made the same sort of slip that McConnell made. He stereotyped all black people as having lower incomes than other people. McConnell stereotyped blacks as not being Americans.
Both were little windows into their assumptions about black people. Biden thought of them as generally having lower incomes,and McConnell thought of them as not being Americans.
You could, I suppose quibble and say that it's true that black people do tend to have lower incomes, while McConnell is flat out wrong about black people not being Americans. But both of those are stereotypes.