Given the President’s brazen, erratic behavior and mood in the last few days, the idea that he could repeat his tantrum and early departure at the last G7 summit in Canada last year cannot be ruled out. After all, he just pulled out of a state visit to Denmark because it refused to discuss selling Greenland.

Trump frequently flings vitriol across the Atlantic, criticizing foreign leaders who have spent the past two-and-a-half years trying, usually unsuccessfully, to work out how to handle him. His behavior is a promise kept to voters who believe that America’s friends have long taken advantage of its power and security guarantees.

Last month, for instance, he blasted French President Emmanuel Macron’s “foolishness” over a digital services tax that hit US companies and vowed to impose tariffs on French wine.

Anticipating trouble from Trump, Macron has abandoned the summit’s regular communique in an effort to take the focus off the disagreements set to rumble in the French surfing resort.