The other states under the US nuclear umbrella find no comfort in the legalesing the difference between "a guarantee" and "an assurance."

If we want nuclear proliferation, breaking our promises is the way to do it.

The idea that a marauding steppe warlord succeeding in Ukraine and taking control of by far the most advanced and experienced near-peer military on the planet, with aspirations to advance further into Europe, is "not our problem" is laughable.