"We don't elect anyone to Congress to represent anyone but 'Americans'"

Look again. For two decades at least (probably three) the formerly-Mainstream Press has been pushing Identity Politics as hard as they can. Largely, I think, because they calculate that because middle-class, white collar, middle-aged white Protestant males make up such a small percentage of the population, they can further the capture of more votes by telling everyone else that they have to vote for this or that candidate because he or she is THEIR race, THEIR sex, THEIR age, THEIR economic class, THEIR sex, their religion, their ethnic background--because this candidate was going to represent THEM and THEIR interests, or at the least (if the candidate was a middle-class, middle-aged white male) would protect them from non-Democratic middle-class, middle-aged white males--anything they could come up with to peel people away from the so-called majority and scare them into voting for the Democrat.

Thus, I've heard female news anchors express astonishment that a certain woman being discussed was going to vote for a man; astonishment that any black person was going to vote for a white candidate; astonishment that Latinos didn't understand politics well enough to automatically reject the white candidate and vote for THEIR candidate, which was assumed by that news person to be the Latino.