China-Iran Ties May Complicate US Relationship, Trump Aide Says

US-China relations risk becoming more complicated if Beijing’s involvement with Iran hurts American interests, President Donald Trump’s top trade adviser said.

US Trade Representative Jamieson Greer Friday said ties between the world’s two largest economies are stable, but warned China against moving closer to Iran amid the Middle East conflict.

Trump has threatened 50% tariffs against goods from countries arming Tehran, a move which could derail the delicate trade truce with China if he follows through. Beijing does not directly ship arms to Iran but provides it with dual-use technology.

“If China is going to be involved in Iran ...