Lighthizer, who campaigned with President Trump, serves as an unofficial adviser. He was reportedly passed over for Treasury secretary, but he remains close to the president. Lighthizer says U.S. trade with China has largely benefited an adversary who has engaged in stealing trade secrets and other malicious actions.

President Trump is slapping tariffs on Canada, Mexico and China starting Tuesday. Here are a few imported goods whose prices may be hit first.

Oil prices jumped at the market open on Monday after U.S. President Donald Trump imposes tariffs on Canada, Mexico and China, raising fears of a trade war and disruption in crude supply from two of the United States' biggest suppliers.