Donald Trump makes a humorous comment about the video of Macron's wife slapping him, suggesting the incident was a joke between spouses.

US President Donald Trump expressed his opinion on the video showing the moment French President Emmanuel Macron's wife slapped him in the face as they got off a plane during a visit to Vietnam.

With a grin on his face, Trump responded to a question from a Fox News reporter about the bizarre video, offering advice to Macron: "Always make sure the door is closed."

In a subsequent press conference, Trump expressed his lack of full knowledge of the incident, but clarified that he had spoken to Macron, confirming that the French president and his wife were fine and that they were both wonderful people.