Hillary Clinton has revealed how she felt 'stalked' by her Republican opponent Donald Trump during that second televised debate.

In her first interview since last Sunday's debate, the Democratic candidate told Ellen DeGeneres that she was left feeling 'weird' by the incident in which Trump lurked behind her on stage.

She said kept feeling a 'presence' behind her, and said : 'I felt, whoa, this is really weird. He would literally stalk me around stage and it was so odd'.

Clinton confirmed what body language experts and viewers were quick to notice - with thousands taking to Twitter Sunday evening to suggest his behavior was 'predatory'.

Body language author Janine Driver referred to his movements as a 'pre-assault indicator' and said: 'He's like a dog who's starting to get anxious and being backed into a corner'.

Democratic presidential candidate Hillary Clinton speaks with Ellen Degeneres during a commercial break at a taping of The Ellen Show in Burbank, Thursday

Hundreds of viewers pointed out the Republican's 'creepy' behaviour on social media after he was seen stalking Clinton around the stage and 'looming' over her

Clinton said Trump would 'literally stalk me around stage and it was so odd'.

Comedian Sarah Silverman wrote: 'He's physically trying to intimidate her by standing right behind her this is cray #debate.'

Mike Schauer ‏wrote: 'Trump spent the night lurking behind Clinton like the sexual predator he is.'

Looking forward to the elections and guarding against complacency, Clinton said she didn't want anyone to 'think this election is over' because it has been so unpredictable.

'I'm not taking anything for granted. We've got to work really hard for the next three and a half weeks because, who knows - who knows what can happen?' Clinton said.

Clinton vowed to defend Americans she says have been attacked by Trump on Thursday, telling donors at a fundraiser that the campaign's negative tone might make some people retreat to the Internet to watch soothing cat GIFs.

Without mentioning allegations of sexual assault against Trump, Clinton said, 'disturbing stories just keep on coming' about him.

Trump's intimidating body language during the St Louis debate did nothing to stem mounting concerns about the candidate's attitude towards women

Donald Trump was accused of 'trying to intimidate' his rival Hillary Clinton by lurking inches behind her during the US presidential TV debate on Sunday

But she offered herself as a buffer to his insults of immigrants, African-Americans, Latinos, Muslims and the disabled.

'There's hardly any part of America that he has not targeted.

'Now it makes you want to turn off the news.

'It makes you want to unplug the Internet or just look at cat GIFs,' Clinton said to laughter.

'Believe me, I get it. In the last few weeks, I've watched a lot of cats do a lot of weird and interesting things.

'But we have a job to do and it will be good for people and for cats.'

Clinton delivered her most extensive remarks about allegations of sexual misconduct against Trump days after a video showed him bragging about kissing women and forcing himself on them without their permission.

She also referenced reports that Trump's team may aggressively try to use her husband's past infidelities against her — beyond their decision to bring four former Bill Clinton accusers to last weekend's second presidential debate.

'His campaign is promising more scorched earth attacks. Now that's up to him. He can run his campaign however he chooses.

'And frankly I don't care if he goes after me. I signed on for this.

'But I will defend and stand up for every other person or every other group,' she said.

Clinton urged voters not to become wary of the negative tone of the campaign.

'I think some people are discouraged by it, feel that they don't want to even get involved by voting because it's so abhorrent to them,' Clinton said.