In a world contending with no end of economic troubles, a fresh source of concern now looms: the prospect of a confrontation between union dockworkers and their employers at some of the most critical ports on earth, the New York Times reported. The potential conflict centers on negotiations over a new contract for more than 22,000 union workers employed at 29 ports along the West Coast of the United States. Nearly three-fourths work at the twin ports of Long Beach and Los Angeles, the primary gateway for goods shipped to the United States from Asia, and a locus of problems afflicting the global supply chain. The contract for the International Longshore and Warehouse Union expires at the end of June. For those whose livelihoods are tied to ports — truckers, logistics companies, retailers — July 1 marks the beginning of a period of grave uncertainty. A labor impasse could worsen the floating traffic jams that have kept dozens of ships waiting in the Pacific before they can pull up to the docks. That could aggravate shortages and send already high prices for consumer goods soaring. Some port workers accuse the longshoremen of adding to the chaos at the ports in the lead up to their contract negotiations, boosting their leverage with the terminal operators while stymying the flow of cargo for everyone else. Among those who work on the docks, such depictions fuel grievous resentment. With ports consumed by traffic and Americans bemoaning inflation, the longshoremen grasp that their leverage may be uniquely potent. An impasse or a strike could deal another shock to the global economy, just as the world is grappling with the impacts of Russia’s invasion of Ukraine, and as China imposes new Covid restrictions on industry.