I'm sorry, I'm not sure I understand. Liberals don't believe that countries exert influence on other countries around them? You think Joe Biden objects to the concept of spheres of influence? You brought up Kissinger, you don't think US foreign policy is operating under the logic of realpolitik? I'm not sure what the alternative is to believing that countries act to pursue their interests in other countries. That just sounds like a description of the concept of foreign policy.