To set the stage, Chapter 3 demonstrates heterogeneity in white Americans' reactions to perceptions of threat to white dominance. It first outlines the different forms of perceived “threats” that groups can face and synthesizes existing literature on these topics. Then, using two original survey experiments, it demonstrates that partisanship and racial attitudes drive reactions to narratives about diversification among white Americans. It offers additional evidence from the 2016–2020 VOTER survey – a large, nationally representative survey – that these effects extend outside the experimental context. From these analyses, the chapter concludes that perceptions of status threat are polarized, such that Republicans are more likely to perceive threat in response to diversification compared to their Democratic counterparts. This chapter helps explain why we may expect reactions to explicit racial appeals to be polarized, as well as the first indication that electoral context plays a particularly important role in how white Americans understand threats to their dominance.