I dont watch scandal so this is coming from someone with no knowledge of the show, but (interesting) female leads on (scripted, especially dramatic) tv are few and far between - there are so many male dominated tv shows right now - and even further apart are non stereotypical roles with leading black women/women of color (especially on major networks) it's one of the reasons most peole love cookie (tho she's a stereotype, she's a badass lead) from empire or used to fukk with ugly Betty. So from my interactions with friedns who watch it, they are/were driven by the black female lead (black people already knew and liked keri Washington, and keri has a look/physical build that is appealing to "others"), it had nothing to do with her being involved with a white man. It's also the reason they all love how to get away with murder, we are happy to have black females as leads.
If we were so simple as to love black female white male pairings, shyt like something new would be in the "favorite black movie canon" over all the shyt like best man, love jones, etc. Please don't try to make us into some simpleminded, yaaaas get a white man, bird brains.