PARIS — It is tempting to say that the relationship between President Emmanuel Macron of France and President Trump is the unlikeliest of friendships, but that would be to miss the point.

Sure, they agree on very little. Not on Iran. Not on trade. Not on the European Union. Not on climate. Not on whether to criticize Vladimir Putin. Not on the importance of dignity, or truth, or the Enlightenment.

Still, I hear that they speak all the time. Trump follows Macron’s labor-market reforms and calls to congratulate him. The first state visit of his administration will be Macron’s to Washington next month, a special honor for “a great guy.” The French president is Trump’s best friend in Europe, and possibly beyond. Things fizzled with Theresa May, the British prime minister. They never went anywhere with Germany’s Angela Merkel. Trump-Macron is the only trans-Atlantic hinge not creaking.

This is not really surprising. Both men came from nowhere, mavericks hoisted to the highest offices of their lands by a wave of disgust at politics-as-usual. They are, in their way, accidents of history, thrust to power at the passing of an era. Longing for disruption produced these two disrupters.