Every network has a pair of news anchors. One of them is an elegant-looking man, and in almost every case the other one fits Kamala Harris' description to a T: a swarthy woman of no defined race or ethnicity with straight hair and a fake smile.
She's put there because the network news is aimed at female audience, and they put the diarrhea-colored woman with the straight hair and the fake smile on the screen because a woman of any race or ethnicity will identify with her. The white viewers will think she's a white woman with a tan, the black viewers will call her a light-skinned black woman, and the Hispanic viewers will think she looks exactly like them.
Kamala Harris -- like the female news anchor -- is nothing more than a TV character.
The other thing I've noticed is that the people who run network news programs have the absolute dimmest expectations when it comes to the tastes of their black audiences. You'll often see a heavy-set black woman on the air as a news anchor or reporter, but you'll never see a fat white slob in that chair.
This is 100% true of all the local news where I am.
At a Trump rally I noticed the 50 or so press folks (who had sprawled out in prime floor space) were all white guys. Except for the few that went in front of the cameras.