The new chief of staff of the White House, Stephen Miller, has begun the reorganization of the presidential administration in the US, writes the Washington Post. Employees were prohibited from meeting with lobbyists without approval from lawyers, and offices were given more autonomy in public media. Policy oversight has been strengthened, with decisions now going through either Miller's deputy, Caleb Orr, or Secretary of State Marco Rubio. The restructuring comes amid the resignation of Nvidia CEO Jensen Huang, which has raised questions in Washington about chip export controls.