In this book, Yuval Feinstein examines the "rally-round-the-flag" phenomenon in public opinion in the United States, which shows a sudden and sharp increase in the public approval ratings of the sitting presidents in response to a war or security crisis. One of the most extensive investigation of the rally phenomenon to date, Feinstein covers the administrations of thirteen US presidents, from Harry Truman to Donald Trump, seeking to understand why some wars and
security crises have led the public to rally behind the sitting president, but other wars and security crises did not have a similar impact on the public assessment of the president.