California Gov. Gavin Newsom’s six-day trip to China produced a flurry of photo-ops that only spurred more speculation about his presidential ambitions: Newsom grinning while clasping hands with Chinese President Xi Jinping, his tour of a Chinese electric vehicle manufacturer, shots and videos of the governor tieless and sporting sunglasses while touring the Great Wall, and even a few showing the governor’s attempt at some basketball diplomacy with Chinese school boys.