Obviously the term is important to the author, else it wouldn't be there. The author wants to emphasize that the target audience of the ad is very narrow. In t

Obviously the term is important to the author, else it wouldn't be there. The author wants to emphasize that the target audience of the ad is very narrow. In the authors view, Facebook is not trying to target younger, more diverse politicians, but rather older, conservative politicians, who happen to be mostly white. And in my opinion, the author is right and race is an important factor in this issue: There have been many reports that advertisers use Facebook to discriminate according to race, and minorities have rightfully complained loudly about that. It's definitely telling that Facebook targets what we assume to be a very conservative, narrow audience, rather than using their own platforms to spread the message: if they showed the ad on Facebook itself, or on Instagram, it would reach a much wider and more diverse audience. But that's not what they are doing.