Why Europe’s leaders have struggled to speak as one on Iran

BBC: A top consideration of all these European leaders is not wanting to alienate Donald Trump. They desperately hope events in the Middle East will not be another distraction for the US president, preventing him – again – from engaging in finding a sustainable solution to another conflict, this one on their own continent: Ukraine.

But does the evasiveness of some leading European powers about the legality of recent US actions in Iran or Venezuela for example, muddy the waters? They often say this is a Europe of common values, that respects a rule-based international order. But what what exactly are the rules?…