Update: Senior Biden adviser Symone Sanders - who notoriously mocked 'poor white people' after a Trump supporter was beaten in 2016, and said "We don't need white people leading Democrats now," - is taking serious heat for claiming that Biden didn't call a voter fat on during a Thursday event in Iowa.

"To be clear: Any assertion VP Biden said a word about the gentleman's appearance is making this something it is not," tweeted Sanders. "In the latter part of the exchange, the VP began to say "Look, facts" then said "here's the deal." If you've been to a Biden event, you've heard this before."

To be clear: Any assertion VP Biden said a word about the gentleman's appearance is making this something it is not. In the latter part of the exchange, the VP began to say "Look, facts" then said "here's the deal." If you've been to a Biden event, you've heard this before. — Symone D. Sanders (@SymoneDSanders) December 5, 2019

To which Trump's Deputy Director of Communications, Zach Parkinson, replied "This is a lie. It's on video. Biden said "fat" not "facts"" along with an enhanced video where you can clearly make out Biden calling the man "fat."

This is a lie. It's on video. Biden said "fat" not "facts" https://t.co/arA5BalIPu pic.twitter.com/8vcMRQVBFv — Zach Parkinson (@AZachParkinson) December 5, 2019

Symone, just get out of there while you still can https://t.co/nfgNOweSZY — Jack Posobiec 🇺🇸 (@JackPosobiec) December 5, 2019

He said fat. Poor guy so old he doesn’t know what state he is in. Off on dates by 40 years. His health is showing... badly. — Kambree Kawahine Koa (@KamVTV) December 5, 2019

Excited to congratulate @JoeBiden on the grand opening of his “Joe Biden Gym for Fats” next week! pic.twitter.com/A4XA7a7iVn — Retired Orrin G. Hatch (@RetiredOrrin) December 5, 2019

***

Joe Biden lashed out at a voter during a Thursday event in New Hampton, Iowa, after the man suggested that his primary problems are that he's too old, and that he 'set his son up with a job in Ukraine.'

You "sent your son over there, getting him a job to go work for a gas company that he had no experience in - nothing - in order to get access to the President," says the man.

It goes downhill from there:

WATCH: A tense exchange with a voter at ⁦@JoeBiden⁩’s event in New Hampton, IA this morning, where a voter started out by telling Biden he had two problems with him: he was too old, and his son’s work in Ukraine pic.twitter.com/ok7m0ShFPd — Molly Nagle (@MollyNagle3) December 5, 2019

"You're a damn liar, man," Biden clapped back. "That's not true. And no one has ever said that." "Look, the reason I'm running is because I've been around a long time and I know more than most people know. And I can get things done, that's why I'm running." "And you wanna check my shape, let's do pushups together man, let's run, let's do whatever you want to do, let's take an IQ test. OK? " "Number two, no one has said my son has done anything wrong and I did not on any occasion, and no one has ever said it..." To which the man replies, "I didn't say you were doin' anyting wrong." "You said I set up my son to work at an oil company, isn't that what you said? Get your words straight, Jack ."

(The man said it was a gas company).

"You don't have anymore backbone than Trump," the man retorts.

Some have noted that Biden appears to call the guy fat.

Did Biden just call an Iowa voter fat? — Jack Posobiec 🇺🇸 (@JackPosobiec) December 5, 2019

Update: Biden's campaign press secretary claims he said "Look, facts."

That seems like a reaaaal stretch based on the video. It's at the 1:55 mark above — Peter J. Hasson (@peterjhasson) December 5, 2019

Except when one looks at an enhance! version of the clip, Biden clearly says 'fat'.

This is a lie. It's on video. Biden said "fat" not "facts" https://t.co/arA5BalIPu pic.twitter.com/8vcMRQVBFv — Zach Parkinson (@AZachParkinson) December 5, 2019

The man later gets into an altercation with a Biden supporter after suggesting the former VP should drop out of the race.