A college student who Joe Biden called a 'lying, dog-faced pony soldier' after she asked about his poor performance in Iowa has shamed him for 'humiliating' her and said his inability to answer her question shows how extremely poorly he's performing.

Madison Moore, a 21-year-old economics student at Mercer University in Macon, Georgia, said on Monday for people to wave off the former vice president's remark as a 'joke' is 'kind of insulting'. Biden later explained he was quoting John Wayne.

Biden asked Moore if she had ever voted in a caucus and she nodded her head yes while attending his campaign event in Hampton, New Hampshire on Sunday night, leading Biden to call her a 'lying, dog-faced pony soldier'.

Moore said: 'It was kind of humiliating to be called a liar on national TV by the former vice president. Instead of answering that question straightforward, his immediate response was to attempt to invalidate me by exposing my inexperience.

'He has been performing extremely poorly in this race and the fact that he couldn’t just straight answer my question without bullying or intimidating just exacerbates that fact.'

She added: 'I am 21-year old college student, like what the hell do I know? Who cares who I am or my experience. Just answer the damn question.'

Joe Biden called Mercer University student Madison Moore a 'lying, dog-faced pony soldier' after she asked him a question at his event in Hampton, New Hampshire on Sunday. Moore said: 'It was kind of humiliating to be called a liar on national TV by the former vice president'

Moore said: 'Instead of answering that question straightforward, his immediate response was to attempt to invalidate me by exposing my inexperience'

On Monday, a new Quinnipiac University poll, had Bernie Sanders pulling ahead of Biden, with the Vermont senator getting 25 percent of the vote in the Democratic primary while Biden, 77, was only at 17 percent.

This marks the first time Sanders, 78, has taken the front runner slot in a national poll, as the candidates head into the New Hampshire primary tomorrow following the surprising Iowa results - where Biden came in fourth place.

Moore, who is on Mercer University’s debate team, attended Biden's event as part of a school trip, reported the Macon Telegraph.

She asked Biden why voters should believe he could win after his poor performance in Iowa.

'So you're arguably the candidate with the greatest advantage in this race,' Moore said, mentioning how Biden has name recognition as the former vice president and didn't have to take time off from the campaign trail for impeachment hearings like the 2020 candidates who serve in the U.S. Senate.

'How do you explain the performance in Iowa and why should the voters believe that you can win the national election?' she asked.

'It's a good question. Number one – Iowa is a Democratic caucus. You ever been to a caucus?' Biden asked the young voter.

She nodded in the affirmative.

'No you haven't. You've a lying dog-faced pony soldier,' Biden said, getting laughs from the crowd.

'You said you were – but now you've got to be honest. Now, I'm gonna be honest with you. It was a little bit confusing in Iowa,' he said.

Moore later explained she only nodded her head yes because she got nervous, but said she felt whether she had been to a caucus or not was irrelevant.

Biden's spokespeople said the line was taken from a scene in a John Wayne movie, where a Native American chief refers to Wayne as a 'lying, dog-faced pony soldier.'

Moore, who is on Mercer University’s debate team, attended Biden's campaign event as part of a trip for school, reported the Macon Telegraph. She is pictured here giving a speech in a video from 2019

Biden's spokespeople said the line was taken from a scene in a John Wayne movie, where a Native American chief refers to Wayne as a 'lying, dog-faced pony soldier. It appears he was actually referring to the 1952 Tyrone Power film 'Pony Soldier' (right)

Still, Moore said she didn't find it funny, regardless if Biden tried to play it off as a joke.

She added she wasn't expecting for her question to make national headlines, saying: 'If I had expected that I would’ve worn makeup. I would’ve looked a lot cuter.'

Biden has previously used the same phrase and attributed it to a John Wayne movie.

At a 2018 campaign event for Heidi Heitkamp, Biden said of her opponent Kevin Cramer: 'As my brother who loves to use lines from movies, from John Wayne movies, there's a line in a movie, a John Wayne movie where an Indian chief turns to John Wayne and says, ''This is a lying, dog-faced pony soldier.''

It appears Biden may have misquoted John Wayne as it seems he may have been referring to the 1952 Tyrone Power film 'Pony Soldier', which uses the phrase throughout.

Addressing Moore, Biden said: 'But let's assume everything was exactly right in Iowa, the idea that you come in with half the delegates that the leaders come in with in Iowa, does not necessarily say how you're going to win Pennsylvania, how you're going to win Michigan,' he argued, suggesting he'd outperform Sen. Bernie Sanders and former South Bend Mayor Pete Buttigieg in the general election swing states.

'I congratulate Pete, I congratulate Bernie,' Biden continued. 'They were really well organized, better organized than we were in Iowa.'

Biden also argued that 'you have to take the first four as one,' Biden said of the first early voting and caucus states: Iowa, New Hampshire, Nevada and South Carolina.

'Not a single person has won without overwhelming support from the black community, overwhelming, overwhelming. OK?' Biden said.

'Right now I am far and ahead in the African-American community,' he continued, adding that the final result 'remains to be seen.'

Biden has previously used the same phrase and attributed it to a John Wayne movie. At a 2018 campaign event for Heidi Heitkamp, Biden said of her opponent Kevin Cramer: 'As my brother who loves to use lines from movies, from John Wayne movies, there's a line in a movie, a John Wayne movie where an Indian chief turns to John Wayne and says, ''This is a lying, dog-faced pony soldier''

Biden came in fourth place in the Iowa caucuses – although the state's Democratic Party has not officially declared a winner after the contest was thrown into chaos when the reporting app malfunctioned

Iowa has not yet officially declared the winner, but as the results stand Buttigieg came in No. 1 in the traditional metric - the percentage of delegates earned - while Sanders won the popular vote.

Massachusetts Sen. Elizabeth Warren fell in third place with 18 per cent and Biden in fourth with 15.8 per cent.

Other than Amy Klobuchar, who earned 12.3 per cent in the caucus, no other candidate emerged with more than 1 per cent.

New polling out over the weekend shows Biden in fourth place in New Hampshire, as well – with one particular poll showing him only one point ahead of Klobuchar.

He also downplayed expectations in New Hampshire, which holds the nation's first primary on Tuesday. Biden said he can't be expected to top Sanders, who represents Vermont, or Sen. Elizabeth Warren of Massachusetts, since they're from neighboring states.

'Look, who has won a New Hampshire primary ... if you have somebody running in the two states next door to you?' he asked the crowd.

While in the room, Biden's odd comment was taken in stride.

Once it hit the internet, however, it was ripe for critics to rip.

Donald Trump Jr. saw the back-and-forth and suggested it showed that the 77-year-old Biden was deteriorating.

'Are we stil pretending Joe Biden hasn't lost his marbles?' Trump Jr. tweeted Sunday afternoon. The first son then suggested people 'Google a video of him from 30 years ago and compare it to him now and tell me it's the same person!'

'Long gone,' Trump Jr. said.