An Australian journalist's brutal takedown of US President Donald Trump has gone viral.

The ABC's political editor Chris Uhlmann was reporting on the G20 summit in Hamburg, Germany when he delivered a scathing analysis of Mr Trump which set Twitter alight.

'He was an uneasy, lonely, awkward figure at this gathering and you got the strong sense some of the leaders are trying to find the best way to work around him,' Mr Uhlmann said on the Insiders program.

Australian ABC journalist Chris Uhlmann (pictured) set Twitter alight on Sunday with his analysis of US President Donald Trump while reporting on the G20 summit

'Donald Trump's a man who craves power because it burnishes his celebrity.

'To be constantly talking and be talked about is all that really matters and there is no value placed on the meanings of words.'

In his two-minute long report, Mr Uhlmann said Mr Trump had no desire or capacity to lead the world, leaving the G20 the G19.

'We learned that Donald Trump has pressed fast forward on the decline of the United States as a global power,' Mr Ulhmann said.

Mr Uhlmann said Mr Trump (pictured) 'craves power because it burnishes his celebrity'

Mr Uhlmann's comments quickly went viral as people took to Twitter to voice their opinion on the ABC journalist's report

He also took aim at Mr Trump's use of Twitter, saying he 'barks out bile in 140 characters' and 'wastes his precious days as President'.

Mr Uhlmann's comments immediately had Twitter talking, with people praising the journalist for his analysis.

'This is a brutal and honest two minute analysis,' one tweeted.

Another posted: 'Bravo [Chris Uhlmann]! I have read everything on Trump but never seen it put together so concisely and eloquently. Hope this analysis goes viral in US'.

The G20 summit brings together the leaders of the world's top 20 economies.