United States President Donald Trump has appointed his close aide and hardline immigration policy architect, Stephen Miller, as the new White House Chief of Staff.

Trump announced the appointment yesterday, saying Miller would assume office on Monday, November 9, replacing Susie Wiles.

Miller, who currently serves as Deputy Chief of Staff, has been a key figure in Trump's political career since 2016 and played a central role in shaping his immigration policies.

Wiles, the first woman to serve as White House Chief of Staff, will move to the President's political operation.