The document discusses the teachers unions' push for universal preschool as they negotiate for reauthorization of the No Child Left Behind Act, emphasizing that it could lead to increased public sector jobs for union members. While proponents argue that universal preschool will benefit children and support educational success, the document highlights skepticism regarding the actual evidence of its benefits and the unions' self-interest in expanding their membership. The failed Proposition 82 in California serves as a case study illustrating the political complexities and opposition to universal preschool initiatives.