Jamieson Greer, Trump's pick for US trade representative, will play a pivotal role as Trump carries out tariffs hikes on Mexico, Canada and China.

President-elect Donald Trump on Tuesday chose trade lawyer Jamieson Greer as his new U.S. trade representative, elevating a key veteran of his first-term trade war against China to execute a sweeping tariff agenda that promises to upend global trade.

Amid a Thanksgiving week filled with more talk of trade and tariffs than turkey, Trump has tapped a new U.S. Trade Representative with ties to his first administration. Jamieson Greer, who served as chief of staff to former USTR Robert Lighthizer,