[senderista]

The punitive tariffs were a unilateral violation of an existing trade agreement.

[arcticbull]

... one which Trump himself negotiated and signed during his first term.

[senderista]

Indeed, and since it was approved by Congress I'm not sure how Trump has the legal authority to unilaterally violate it without congressional approval. (Not that such legal niceties actually matter, as we've all learned by now.)