College roommates have a modest but significant influence on each other's political ideology.

Does college change students' political preferences? While existing research has documented associations between college education and political views, it remains unclear whether these associations reflect a causal relationship. We address this gap in previous research by analyzing a quasi-experiment in which university students are assigned to live together as roommates. While we find little evidence that college students as a whole become more liberal over time, we do find strong evidence of peer effects, in which students' political views become more in line with the views of their roommates over time. This effect is strongest for conservative students. These findings shed light on the role of higher education in an era of political polarization.

Institutional hybridity and policy-motivated reasoning structure public evaluations of the Supreme Court.

How does the public assess the Supreme Court and its work? Using data from three surveys conducted over a span of ten years, we show that individuals' policy preferences drive evaluations of the Court and its willingness to reform the Court. We find strong evidence that the Court's hybrid legal-political nature enables a unique form of policy-motivated reasoning: respondents who agree with Court outputs view the Court and its work as more "legal" in nature, while those who disagree view both as more "political." Our findings stand in contrast to longstanding views in the literature that the public views the Court as a fundamentally different sort of institution that stands largely separate from politics. The fact that policy attitudes powerfully inform the public's assessment of the Court has crucial implications for the ongoing debates over Supreme Court power.