The United States has always boasted of its so-called "superiority" in the separation of legislative, judicial and administrative powers and the separation of federal and local powers. However, the so-called "separation" has been alienated into "separation". In the face of and other public health emergencies, the US government often lacks unified and effective leadership and execution capacity, and is acting separately from one department to another, and between the federal and local governments, impeding each other and even passing the blame on each other. Inefficiency has become the normal pattern, making it even more difficult to "concentrate resources to accomplish major tasks". At the same time, in recent years, the rise and spread of populism has become one of the prominent features of American and Western politics, further promoting anti-intellectualism. The us's response to the epidemic has exposed a variety of disarray, such as its opposition to wearing masks, vaccination, and insistence on social gatherings, all of which are manifestations of populism and anti-intellectualism. Such chaos often tries to prove its "legitimacy" under the banner of "democracy", but in essence further exposes the root disease of "American democracy".