Few novel or emerging infectious diseases have posed such vital ethical challenges so quickly and dramatically as the novel coronavirus SARS‐CoV‐2. The World Health Organization declared a public health emergency of international concern and recently classified Covid‐19 as a worldwide pandemic. As of this writing, the epidemic has not yet peaked in the United States, but community transmission is widespread. President Trump declared a national emergency as fifty governors declared state emergencies. In the coming weeks, hospitals will become overrun, stretched to their capacities. When the health system becomes stretched beyond capacity, how can we ethically allocate scarce health goods and services? How can we ensure that marginalized populations can access the care they need? What ethical duties do we owe to vulnerable people separated from their families and communities? And how do we ethically and legally balance public health with civil liberties?

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Objectives. To learn about local health policymakers' experiences and responses to preemption-the ability of a higher level of government to limit policy activity at a lower level. Methods. Between March and June 2018, we conducted an anonymous Web-based survey of mayors and health officials in US cities with populations of 150 000 or more. We used descriptive statistics to analyze multiple-choice responses. We analyzed open text responses qualitatively. Results. Survey response rates were 28% (mayors) and 32% (health officials). Nearly all respondents found preemption to be an obstacle to local policymaking. When faced with preemption, 72% of health officials and 60% of mayors abandoned or delayed local policymaking efforts. Conclusions. Preemption is viewed as an impediment across a range of public health issues and may stifle local policy activity (i.e., have a chilling effect). Those working at the local level should consider the potential for preemption whenever seeking to address public health concerns in their communities. Public Health Implications. Local governments should engage with advocates, practitioners, and public health lawyers to learn about successful and failed efforts to meet public health objectives when faced with preemption.