Global favorability toward the United States declined by more than 10 percentage points from 2016 to 2017. This shift coincided with the end of the Obama administration and the inauguration of Donald Trump—but did Trump’s election cause America’s standing abroad to erode? Leveraging a natural experiment, we show that Trump’s victory had an immediate, negative effect on international public opinion toward the United States. Our identification strategy exploits the fact that a major cross-national survey, the AmericasBarometer, was in the field when the 2016 US presidential election occurred. Using data from four Latin American countries, we compare respondents surveyed just before and after the election. We find that Trump’s unexpected win caused a sharp drop in trust in the US government. While scholars have long observed that domestic political considerations shape leaders’ foreign policy decisions, we show that domestic political events—such as elections—can also affect a country’s international image.