President Trump began the Group of Seven (G7) summit Monday in Canada by arguing it was a mistake to kick Russia out of the organization more a decade ago. “The G7 used to be the G8. Barack Obama and a person named [former Canadian Prime Minister Justin] Trudeau didn’t want to have Russia in, and I would say that was a mistake, because I think you wouldn’t have a war right now if you had Russia in,” Trump said during his first meeting of the summit with Canadian Prime Minister Mark Carney. Trump has made similar comments in the past....