A senior Pentagon official has said the United States is more concerned about a regional conflict that escalates into nuclear use than about a surprise mass nuclear strike on American soil.
Elbridge Colby, Under Secretary of Defense for Policy, made the remarks at the 2026 United States Strategic Command Deterrence Symposium. He argued that the sheer scale of consequences from a large-scale nuclear strike against the US would itself deter any country capable of launching one.
“What I would fear more is a regional war,” Colby said, describing the scenario as “a kind of local war, conventional war that might have local employment, God forbid, of nuclear weapons that could escalate from there as it expanded outward.”
The particular danger, he explained, lies in compressed decision-making timelines. One side could misread an adversary’s military movement as preparation for a total strike and respond at a far greater scale than the situation warranted. “That would lead very rapidly to an incredibly pressurised situation that would be almost by definition not in our interests,” he said.
Colby said the solution was not to strip the president of options but to expand them. “It’s not taking away options for the president. It’s adding credible options,” he said. He called the modernisation of America’s nuclear deterrent “the single most important initiative for the American military.”
On doctrine, Colby said the administration was not conducting a fresh nuclear posture review, but was instead reviewing nuclear employment guidance and focusing on executing existing modernisation plans. “This is so important, we know where we’re going… now it’s about execution,” he said.
He also pointed to a structural shift in the global nuclear balance. China’s expanding arsenal means the United States now faces two potential nuclear peers simultaneously, a situation with no Cold War precedent. “I remain cautiously optimistic about the ability for us to maintain effective deterrence in the context of three sort of great power nuclear states,” he said. “I’m not sanguine about that.”
Colby added that diplomatic engagement remained consistent with strength. “If you can try to mitigate these pressures through engagement, through respectful dialogue, that’s totally consistent with being strong,” he said.
