Dr Drew Pinsky has said that he thinks 'something's not right' with Beto O'Rourke.

The Celebrity Rehab host shared his 'gut' feeling with Fox Nation host Brian Kilmeade on Friday, after listening to a portion of Democratic presidential nomination candidate O'Rourke.

'I thought that was Tony Robbins,' Pinsky said of O'Rourke's exuberant affect in the video. Robbins is a motivational speaker.

'I'm just saying, there's something gonna go down there. I can feel it coming. I don't know what it is... There's something not right,' Pinsky continued.

Dr Drew Pinsky (left) shared his 'gut' feeling with Fox Nation host Brian Kilmeade on Friday

'I don't know what it is... There's something not right,' Pinsky said of O'Rourke, who is seen above speaking with supporters in Iowa on Friday

'What are you picking up?' Kilmeade pressed Pinsky, who is an internist and addiction medicine specialist.

'Something in my gut. I'm not sure yet,' Pinsky said. 'I haven't really examined it carefully enough. I just can tell there's a disconnect between what people think they're seeing and what's there. That's where I'm at.'

O'Rourke's campaign launch video, a three-minute clip released on Thursday, featured him energetically waving his right arm as his wife sat silently on the couch next to him clinging to his left arm.

President Donald Trump criticized O'Rourke after watching a subsequent appearance in Iowa on the news.

'Well I think he's got a lot of hand movement. I've never seen so much hand movement,' Trump said in the Oval Office on Thursday.

'I said, "Is he crazy? Or is that just the way he acts?"' the president said. 'I watched him a little while this morning doing – I assume it was some kind of a news conference. And I've actually never seen anything quite like it. Study it. I'm sure you'll agree.'

Democratic presidential candidate Beto O'Rourke answers questions from voters during his second day of campaigning for the 2020 nomination at The Sing-A-Long Bar in Iowa

On Friday, it was revealed that O'Rourke was a teenage computer hacker who posted fiction about killing children.

O'Rourke acknowledged in an exclusive interview with the author of a forthcoming book that he belonged to the Cult of the Dead Cow, the oldest group of computer hackers in U.S. history.

And O'Rourke was revealed to have posted fiction during his time as a hacker, including a short story written from the point of view of a driver who intentionally killed two children because they were 'happy.'

He also posted poetry dedicated to 'The Cow' which said: 'Thrust your hooves up my analytic passage, Enjoy my fruits.'

Oddsmakers currently show O'Rourke in fourth for the nomination, after Bernie Sanders, Kamala Harris and Joe Biden.

Dark horse candidate Andrew Yang, a businessman who wants to institute a universal basic income paying all citizens $1,000 per month, has seen Vegas odds shorten among a surge of online interest in recent days, and is currently tied with Cory Booker among most bookies.