Grok:

California officials including Gov. Newsom and the mayors of LA and San Diego condemned the remarks as dangerous and reckless, while the White House clarified Trump was underscoring threats a nuclear Iran would pose absent US action.

Grok on Iranian missile capabilities:

Iran does not currently field any ballistic or cruise missiles with the range to reach California or the continental United States.The straight-line distance from Tehran to Los Angeles is roughly 12,250 km (about 7,600 miles). Iran’s longest operational ballistic missiles—systems such as the Shahab-3 family, Sejjil, and Khorramshahr/Kheibar variants—are assessed at approximately 2,000 km, with some reported tests or lighter-payload configurations potentially reaching 2,500–4,000 km (enough, in principle, for parts of southeastern Europe or distant bases such as Diego Garcia). That remains well short of intercontinental range.An intercontinental ballistic missile (ICBM) is conventionally defined as having a range of at least 5,500 km. U.S. and other Western assessments state that Iran has not demonstrated or deployed such a system. Its space-launch vehicles use related technology, but they have not been converted into operational ICBMs capable of delivering a warhead to the U.S. West Coast. Recent Iranian statements (as of early October 2026) about extending missile ranges beyond the long-standing ~2,000 km political limit refer to improved regional or European reach, not strikes on North America.Iran can threaten U.S. bases and forces in the Middle East and, at the outer edge of current capabilities, limited targets farther afield, but it has no verified means of striking California with missiles launched from its territory.

Grok on North Korean missile capabilities:

North Korea is assessed to have intercontinental ballistic missiles capable of reaching California and the rest of the continental United States, unlike Iran.

The distance from North Korea to the U.S. West Coast is roughly 8,200–9,500 km (about 5,100–5,900 miles), depending on the specific launch site and target city. Systems such as the liquid-fueled Hwasong-15 and Hwasong-17, and the solid-fueled Hwasong-18, have demonstrated lofted-trajectory flights that analysts calculate would translate to operational ranges of roughly 13,000–15,000 km with a lighter payload. That is enough to cover the West Coast, including Los Angeles and San Francisco, and in higher-range estimates the East Coast as well. North Korea has also displayed the Hwasong-19 and Hwasong-20, which are described as having similar or greater reach.

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I will let the readers decide for themselves what this information means.