Six of the Group of Seven leaders were wrapping up their summit on Tuesday, attempting to prove that the wealthy nations' club still has the clout to shape world events despite the early departure of U.

U.S. President Donald Trump sounded an optimistic tone as he met with Prime Minister Mark Carney Monday on the sidelines of the G7 summit in Kananaskis, Alta., to discuss tariffs and other trade irritants — saying he thinks the two leaders can hammer out a deal within weeks or sooner.