The U.S. government considers “power competition” to be the nature of the relations among big powers, and that it will have an impact on the evolving nuclear order in the near future. When big powers worry about power challenges from their rivals, they may use the influence of nuclear weapons to defend their own power and therefore intensify the danger of nuclear confrontation. We need to manage the nuclear relations among nuclear-weapon states and nuclear-armed states to avoid the risk of nuclear escalation. The fact is that big powers including the United States have neither the interest nor the capability to expand their power, and understanding this might cause big powers to lose their interest in power competition. If we promote dialogue among nuclear-weapon states and nuclear-armed states on their strategic objectives, it is possible to reduce the power competition that results from misperceptions and overreactions. Some other factors, for example, non- nuclear technologies and multinuclear players, could complicate the future nuclear order. We therefore need to manage these factors as well and develop international cooperation to mitigate nuclear competition.