Abstract: In 2016, Trump’s election ushered in a post-liberal era in American history. His deviant views on liberalism triggered a war between liberal pluralism and ethnic nationalism in the United States and the Western world. Study found that Huntington and Trump are soul mates. Whether it is his criticism of immigration policy or his indignation at multiculturalism, his oath of nationalism or his call to White-centrism, his dissatisfaction with global supranationalism or his conversion to China as a core imagined enemy, Huntington resonates with Trump’s domestic and foreign policy philosophy. Through the interpretation to the situation of The Times for Huntington text across, we reviewed American politics from 1960 s to today’s development in the perspective of historical politics. The conclusion is that Trump’s post-liberal turn is the result of the failure of liberal policies. From the source, it can be traced back to the transformation of the Democratic Party from the economic left to the cultural left in the 1970s. From the consequences, it led to the revival of the “ethnic nationalism”.