As the title says what happens if one NATO member attacks another? WIth Trump threatening Denmark over Greenland and Panama over the canal, what would and should other NATO members do? Personally I think they could kick America out of the alliance, Trump is threatening Canada too, albeit with serious economic sanctions, but is this any less an act of war than a military option? What does he want Canada for anyway?
People think it's all just noise and that he won't do any of these things once in office, I'm not sure I believe that, I think there's every chance he will.