The president-elect said that he would impose the across-the-board tariffs on Day 1 and that they would stay in place until Canada, Mexico and China halted the flow of drugs and migrants.

If confirmed as trade representative, Jamieson Greer would be responsible for negotiating directly with foreign governments on trade deals and disputes.

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.