A commentator and Donald Trump supporter has been slammed for suggesting there are no longer any facts, in an interview about the president-elect's claim that 3 million undocumented immigrants voted for Hillary Clinton.

Scottie Nell Hughes, CNN commentator and journalist, made the comments on NPR's The Diane Rehm Show on a panel discussion about the media under a Trump presidency.

"There's no such thing, unfortunately, anymore as facts. And so Mr Trump's tweet amongst a certain crowd, a large — a large part of the population, are truth," Hughes told the panel.

"When he says that millions of people illegally voted, he has some — in his — amongst him and his supporters, and people believe they have facts to back that up. Those that do not like Mr. Trump, they say that those are lies, and there's no facts to back it up."

However, Hughes faced an immediate backlash from her fellow guests on NPR, who questioned how she could suggest there were no longer any facts, Raw Story reported.

Glenn Thrush, from Politico, responded: "First I've got to pick my jaw up off the floor here. There are no objective facts? I mean, that is — that is an absolutely outrageous assertion. Of course there are facts.

He added: "There is no widespread proof that three million people voted illegally. It's been checked over and over again. We had a Pew study that took place over 15 years that showed people had more likelihood of being struck by lightning than voting illegally in an election."

Voter fraud was an ongoing discussion throughout the presidential election, with Trump suggesting before many people had even cast their votes that the election had been rigged by Clinton supporters in the mainstream media.

Trump repeated his claim that undocumented immigrants had voted for Clinton, stating on 27 November he would have won both the electoral vote and the popular vote if the number of undocumented immigrants who voted for Clinton were discounted.