AXIOS (Dave Lawler) - The year that shook the Gulf
The United Arab Emirates is leaving OPEC . Saudi Arabia is ending its splashiest foreign sports venture. The two U.S. allies are in the midst of a messy divorce, even as both face fire from Iran . Why it matters: One year after President Trump's grand tour of the Gulf, the region's vision of a geopolitically stable post-oil future — powered by tourism, AI and American capital — has taken a major blow. - The trillions of dollars in investment pledges that Trump secured on his trip are in limbo. - So is the American "golden age" he claimed would be bankrolled in part with Gulf money. The big picture: Trump's trip may prove the high-water mark for the idea that the future of artificial intelligence, global investment and geopolitics…