Her district is what, half-white? So in order to fire up *part* (and I do mean part) of her black base, she's going to alienate whatever white support she might have. She just signaled to every white liberal in her district that she would rather have the support of racist vermin like Farrakhan than your typical white suburban soccer mom liberal.
This move will lose her more votes than it will gain and may well seal her defeat. All together now, "awwwwww".