“Ronald Reagan's presence looms so large in gangsta rap, and casts such complicated shadows, that to invoke his name in a rap song is to summon an entire worldview and refer to a constellation of injustices in two syllables. Killer Mike uses Reagan's name, smack in the center of his career-defining new album R.A.P. Music, as an artful metaphor for perpetuation of injustice. In "Reagan," Ronald Reag”