Bernardi vows frank, fearless report on UN

Cory Bernardi says he won't fall under the spell of the United Nations when he tours there later this year.

Conservative Liberal Cory Bernardi has vowed he won't succumb to "Stockholm syndrome" when he goes on a secondment to the United Nations.

Senator Bernardi has previously described the UN as an "unelected and unaccountable body" and a "fiscal black hole of bureaucracy".

"This secondment will provide me with a first-hand experience of whether those descriptions are accurate or not," he said in his latest newsletter.

Senator Bernardi said he's looking forward to seeing first-hand how the UN operates when he jets off for the three-month tour in September.

He's promised to be frank and fearless in his final assessment.

"Of all the people I know I am the least likely to be captured by Stockholm Syndrome in such an environment," he wrote.

The syndrome is a psychological phenomenon where hostages have positive feelings towards their captors.

The South Australian Liberal senator will also use the experience to observe the US presidential election, adding he's long warned about the anti-politician sentiment that Donald Trump has been tapping.