“It could be 3 million, it could be 30 million”: Quantitative misperceptions about undocumented immigration and immigration attitudes in the Trump era

Recent changes in the sociopolitical US landscape calls for the examination of the level of quantitative misperception about undocumented immigration and its connection with immigration attitudes. Nationally representative survey data are used to analyze whether being misinformed about the proportion of US immigrants that are undocumented in 2015 is linked with abstract immigration attitudes and four immigration policy options in 2016. The results reveal that people who overestimated undocumented immigration—a common misperception—are more likely to report that all immigrants present symbolic threats to the country than are their accurately informed peers. Consistent with the especially high salience of the US–Mexico wall in this period, overestimators also place more importance on building the wall but not on other policy options. These findings have important theoretical and real-world implications, given the current social and political context and spillover effects on Latinx and other racialized communities.