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... Through the past two months of tariff chaos " marked by false starts, confusion and presidential threats followed by quick reversals -- US Trade Representative Jamieson Greer has largely been out of the picture. He was only confirmed to his role in late February, creating a void filled by White House adviser Peter Navarro and Commerce Secretary Howard Lutnick to handle messaging. ...

Greer -- a cool-headed, legal-minded acolyte of Trump's first-term trade adviser Robert Lighthizer -- is seeking to wrestle control of a planned April 2 announcement on a litany of new duties, according to people familiar with the deliberations, who requested anonymity to discuss ongoing negotiations.

Trump has dubbed that day "the big one," with his administration set to impose import taxes on trading partners based on levies and other restrictions they place on US goods. Tariffs on autos, semiconductors and pharmaceuticals are also planned. It's unclear exactly how soon after the announcement all of the duties will take effect. ...