Oklahoma Gov. Kevin Stitt announced he's launching his state's own Division of Government Efficiency, a reference to the Musk-backed Department of Government Efficiency that has stoked controversy in Washington as it has clashed with executive agencies.

Last-minute phone calls pull the North American neighbours back from the brink of a trade war, but the US is still targeting Chinese imports.

U.S. tariffs of 10% on Chinese imports came into effect on Tuesday, risking a renewed trade war between the world's top two economies as President Donald Trump punishes China for not halting the flow of illicit drugs.