Photo taken on April 15, 2026 shows a container terminal of the Port of New York and New Jersey, which serves as a critical gateway for trade and a major logistics hub for the Northeast of US, in New York, the United States. [Photo/Xinhua]

Tariffs and geopolitical tensions are adding uncertainty to global manufacturing supply chains, complicating sourcing decisions and long-term investment planning, industry and port leaders said.

Lance Hastings, president and CEO of the California Manufacturers & Technology Association, said manufacturers remain broadly positive about business prospects but are cautious about an unsettled global trading environment.

"There's still some anxiety as the year wraps up," Hastings said during a recent virtual media briefing with Port of Los Angeles executive director Gene Seroka.

"Manufacturing decisions aren't 30-day or 60-day decisions; they're actually six-year, 10-year horizons," he said, adding that sudden disruptions make it more difficult for companies to plan with confidence.