The couple first caught public attention last July, when they had dinner together in Montreal.

US President Donald Trump resumed his trip to the World Economic Forum in Davos, Switzerland, hours after a "minor electrical issue" forced his plane to return to its air base in Maryland.

US President Donald Trump said Tuesday that NATO continues to exist thanks to him, as European leaders meeting in Davos vowed an "unflinching" response to his threats to take over Greenland.