The two are expected to meet on the sidelines of a G7 summit in Kananaskis, Alberta, for their second in-person encounter.

The return on Donald Trump to the G7 was always going to be unpredictable. That it is happening against the backdrop of an escalating conflict in the Middle East makes it even more so.

Leaders of some of the world’s biggest economic powers will arrive in the Canadian Rockies on Sunday for a Group of Seven ...