In the long term, the challenge is more vague, but deeper. The longer the US obsesses over its own political dysfunction and attendant economic stagnation, the less likely it is to bear the mantle of global responsibility and leadership.
长期挑战虽然比较模糊，但却更为深刻。被自身政治障碍及随之而来的经济停滞困扰的时间越长，美国承担全球义务和领导责任的可能性就越弱。