In March 2017, the Supreme Court decided "Friedrichs v. California Teachers Association" and upheld the constitutionality of agency fees for nonunion teachers. We examine how "Friedrichs" reflects a host of issues grouped around a patchwork of ideological commitments regarding teachers unions and public-sector unions more generally, partisan politics, and empirically oriented claims about the impact of teachers unions on students' educational opportunities. We particularly argue that the case reflects a tension between judicial, scientific, and democratic decision-making, and that courts and reformers should be sensitive to this tension as they consider similar cases moving forward.