Mr. Miller, one of President Trump’s top advisers, sold shares in the mining company MP Materials following a lucrative deal between the company and the government.
Stephen Miller, one of the president’s top advisers, sold shares of a mining company after it had begun negotiations with the government, raising concerns among ethics experts.
Hearings that began Wednesday in Washington reflected anxiety over the future of the U.S.-Mexico-Canada trade pact and whether the president could end up scrapping it.
MP Materials, which owns rare earth mines in California, is among the private companies in which the Trump administration has acquired an ownership stake.
In an unusual move, Xi Jinping, the leader of China, called President Trump. The two spoke about trade, Taiwan and Ukraine, according to separate official statements.