Marco Rubio slammed the post-Cold War liberal order during his confirmation hearing

Sen. Marco Rubio's confirmation hearing for secretary of state signaled a major shift in U.S. foreign policy.

Julian Zelizer : Rubio took direct aim at the postwar liberal order in his opening statement.

He says repudiating postwar globalism means a return of American foreign policy based on the American national interest.

Zelizer says Karl Popper's influence on postwar global order cannot be overstated.

Are we going to be an endlessly open society, committed only to open borders and free trade, with no sense of national solidarity or loyalty to the American nation and people? Or will we rediscover what the West cast aside after World War Two and embrace again the loyalties and truth-claims that enable a nation and a people to cohere and pursue their collective interests over and against those of other nations?.