Looking at some recent natural language statements:

When Mitch McConnell said something like "Black Americans show up to vote just as much as Americans do" he was criticized for implying that Black Americans aren't Americans. He then qualified his statement to claim that he accidentally left out "all" or "other" Americans.

So we have the possibility of two statements from McConnell:

(1) Black Americans aren't Americans.

(2) Black Americans are a subset of All Americans, which includes White Americans, Asian Americans, etc.

In theory, he can't be saying both.

But in reality, Mitch McConnell does know that Black Americans are Americans. And at the same time, he does not consider them to be members of the group he considers to be "Americans" since they do not espouse the values of White Republican Americans (the "no true Scotsman" fallacy).

Probably McConnell did (as a statement for public distribution) accidentally leave out "all" or "other." But the error was, in my view, a Freudian slip. I don't think McConnell considers Black Americans or Democrat Americans to be "true" Americans.

So his statement as quoted was not indicative of what he intended to say, but it was indicative of what he believes.