Complex sentence: Quillen amassed a large campaign treasury due to having received many large individual and PAC contributions, including those well financed PACs representing the beer, wine, and spirits beverage industries, but never really needed to use it given the heavy Republican tilt of his district.
Split into simpler sentences: Quillen amassed a large campaign treasury due to having received many large individual and PAC contributions, including those well financed PACs representing the beer, wine, and spirits beverage industries. He never really needed to use it given the heavy Republican tilt of his district.