[johanyc]

I believe you mis remembered it. He didn't rule out military intervention.

In an interview reported by Reuters, he said he’d impose 150%–200% tariffs if China “went into Taiwan,” and when asked about using military force against a blockade he said it “would not come to that” because Xi “respects me” and knows he’s “crazy.”

https://www.reuters.com/world/trump-says-he-would-impose-tar...