Donald Trump is trying to link the COVID-19 pandemic to fear of immigration. There is precedent for linking infectious disease to that issue and winning elections as a result. When an Ebola outbreak came to U.S. public attention just before the 2014 midterm elections, Republicans were able to use it to their political advantage. Claire Adida finds that Republican politicians successfully raised fear of immigration by politicizing Ebola. Filipe Campante finds that local Ebola outbreaks gave Republicans an electoral advantage by changing immigration attitudes. They both see big differences this time, even though Republicans are trying to repeat the success.