When U.S. President Donald Trump last came to Canada for a Group of Seven summit, the enduring image was of him seated with his arms folded defiantly as then-German Chancellor Angela Merkel stared daggers at him.

Trump heads to G7 summit promising new trade deals while his "90 deals in 90 days" pledge falls behind schedule with growing global tensions.

President Donald Trump departed the White House on Sunday en route to Western Canada for the annual G7 summit, promising to secure trade deals weeks ahead of a tariff hike deadline.