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.
President Trump’s decision to allow Nvidia to sell its chips to China has raised questions about whether he is prioritizing short-term economic gain over long-term American security interests.
The government says it will fast-track immigration for U.S. H-1B visa holders and spend more than $1 billion to attract researchers from the United States and the rest of the world.