NATO allies, he wrote, privately agreed that Iran could not be allowed a nuclear weapon but refused to help when asked. America no longer needs or desires their assistance. We never did. Let that land.This is not bluster. It is a doctrine. Trump is telling every European government that the Article 5 guarantee they have sheltered under for seventy years was always conditional, and that they have now demonstrated they will not honour their side of the arrangement when it matters. The mutual defence alliance that kept the peace in Europe since 1949 has just been publicly declared a one...