India, March 20 -- Former US President Donald Trump has insulted Australia's Ambassador to the US, Kevin Rudd, by calling him "not the brightest bulb" and suggesting that he "won't be there long" if "he's at all hostile" towards him.

Rudd, who has been critical of Trump, previously blasted him as "the most destructive president in history" and "a traitor to the West".

During an exclusive interview with Trump, GB News' Nigel Farage asked the GOP leader about the AUKUS agreement and Rudd, reminding the 45th US president how the former Australian PM had been scathing of him.

In response, Trump slammed Rude as "nasty" and asserted his tenure in the position would be shortened if he is re-elected.

"I heard he was a little bit nasty, I hear...