Eh, he's an old white southern Republican. He's racist. It's really only a question of degree.
And it was a Freudian slip if the tongue if anything.
He is probably racist, sure. But to mentally distinguish between black people and "real" Americans isn't really what comes to mind when I think of racism against black people, unless we're talking about some super hardcore "black people are invaders from Africa!" white nationalist shit, which I doubt McConnell subscribes to. Now, if it were Hispanic people we were talking about, and in particular Puerto Ricans, then I might agree that this would be a case of saying the quiet part out loud, because it is very common among bigots to assume that Hispanics are illegal immigrants and that Puerto Ricans aren't real Americans. For example, people gave Kimberly Guilfoyle a lot of shit
when she implied that her Puerto Rican mother was an immigrant, because although she herself probably knew better, her words were very likely chosen to fit the conservative belief that Puerto Ricans don't count as Americans.
The Ukraine story Tom referred to is no more true now than it was back when Trump first clumsily tried to smear Biden over it. Hunter Biden was never in any legal jeopardy over an investigation into Burisma, as the period of time that the investigation concerned
preceded his employment with the company. Viktor Shokin was fired because he was corrupt and ineffective, and this was the position of pretty much the entire international community at the time, not a personal whim of Biden. Hunter is absolutely a dumb failson who trades on his father's name, but he and his father were not partners in any kind of corruption scheme. That simply is not what happened, and any honest appraisal of the evidence we have will come to the same conclusion.