Newly-appointed White House communications director Anthony Scaramucci is threatening to get the FBI involved in a crackdown on leaks from the Trump administration.

President Donald Trump has become distrustful of some of his White House staff and heavily reliant on a handful of family members and long-time aides

US president-elect Donald Trump has picked Michigan Republican chief Ronna McDaniel to chair the national party, in part as a reward for netting the state's first election victory in 28 years.