As part of the current immigration crackdown, federal agents have turned to profiling, making stops on the basis of occupation or perceived ethnicity. In a system where confirming legal status can take days or weeks, agents are finding shortcuts in stereotypes. Aside from the dubious constitutionality of these stops, the assumptions behind these tactics raise questions: What makes someone look illegal? According to whom? And how do these perceptions emerge?

René Flores is an associate professor of sociology at the University of Chicago. His work investigates how social boundaries form around immigrants and racial minorities and how these divisions contribute to inequality. In this conversation with host Geoff Wodtke, Flores discusses the complicated views Americans express about immigrants in surveys, how those views affect immigrants and non-immigrants alike, and how a perception of “social illegality” can extend beyond actual documentation status.