Pete Buttigieg, former US secretary of transportation, speaks during the Global Progress Action Summit at the Fairmont Royal York Hotel in Toronto, Canada. | Soeren Stache/Picture Alliance via Getty Images TORONTO — At a conference bookended by speeches from President Barack Obama and Canadian Prime Minister Mark Carney, the leading lights of the global center-left gathered to consider their fate.  The Global Progress Action Summit was billed as a “progressive version of CPAC,” the right-wing