President Donald Trump’s rapid-fire trade war has set in motion a commercial rupture without precedent, which is rippling through the global economy in unpredictable and costly ways. The triple-digit taxes that the president has imposed on Chinese products — and China’s retaliatory measures — are expected to shrink trade between the world’s two largest economies from a recent annual peak of nearly $700 billion to almost nothing.

A POLITICO survey of more than 15 countries, including five key Asian trading partners, suggested confusion about the administration’s approach.