ecns.cn (2024-11-30). Comicomment: U.S. obsession with hegemony threatens the world. ecns.cn The U.S. has increasingly used "national security" as a justification to impose trade barriers, blacklist foreign companies, and impose sanctions, disrupting global trade and economic stability. Economic coercion has become a key tool in U.S. foreign policy, undermining the global trade system and threatening international order.