Why the collapse of the last US-Russia nuclear treaty matters for China and the world

China on Tuesday urged the United States to “respond positively” to Russia’s offer to maintain nuclear warhead limits ahead of Thursday’s expected collapse of a major US-Russia agreement to control nuclear build-up. Beijing also reiterated its refusal to join trilateral nuclear disarmament negotiations with Washington and Moscow, despite repeated calls for such talks by US President Donald Trump. China cited the disparity in nuclear stockpile sizes as the reason for its refusal. Absent a...