US President Donald Trump has launched an extraordinary spray at an Australian reporter, threatening to report their "tone" to Prime Minister Anthony Albanese.

ABC journalist John Lyons, on assignment for the program 4Corners, quizzed Trump on his business dealings while in office, asking if it was "appropriate" for a sitting president to be engaged in so much personal commerce.

"My kids are running the business," Trump said, before asking where Lyons was from.

"The Australians. You're hurting Australia, right? In my opinion, you are hurting Australia very much right now," Trump said.

"And they want to get along with me. You know, your leader is coming over to see me very soon. I'm going to tell them about you. You said a very bad tone."

The Trump family has been involved in n

See Full Page