John Mearsheimer, a University of Chicago professor, dissected the underlying reasons for Europe's perceived weakness toward the Trump administration. He pointed out that on one hand, Europe relies on U.S. security guarantees; on the other, Trump is fundamentally a bully, the more you show weakness, the more he pushes his advantage. Despite repeated public humiliations, Europe has consistently refrained from countermeasures due to the power disparity and long-standing dependency. The result is that the United States can act almost with impunity, while Europe responds with only mild rhetoric.