When it became clear that Donald Trump would become the new US president on election night in 2016, the website for Citizenship and Immigration Canada crashed. It was overwhelmed by Americans afraid that the United States would once again enter a period of intolerance and military aggression. In American Refugees, Rita Deverell shows that from the Revolutionary War to the Underground Railroad through to McCarthyism and Vietnam, Americans have fled to Canada in times of crisis. Many still flee. All have sought better lives, while helping to shape Canada into the country it is today.