By 1957, the relationship had deteriorated to the point where, rather than talking face-to-face, the senators exchanged angry letters delivered almost daily by messenger between offices in close proximity. Although the letters were private, the feud quickly became public through letters leaked to the press and comments made to colleagues and other third parties, who often had trouble deciding what the fight was about. Drukman describes the feud as a "classic struggle ... of dominating father and rebellious son locked in the age-old fight for supremacy". The feud ended only with Neuberger's death in 1960.