Complex sentence: Meanwhile, Democrats retired the ailing Senator B. Everett Jordan, who lost his primary to Congressman Nick Galifianakis, who represented the "new politics" of the young, the African-Americans, and the anti-establishment, based around the urban Research Triangle and Piedmont Triad.
Split into simpler sentences: Meanwhile, Democrats retired the ailing Senator B. Everett Jordan, who lost his primary to Congressman Nick Galifianakis. The latter represented the "new politics" of the young, African Americans, and the anti-establishment, who were based in and around the urban Research Triangle and Piedmont Triad.