Sen. Bernie SandersBernie SandersProgressives soaring after big primary night 'Absolutely incredible': Ocasio-Cortez congratulates Cori Bush on upset victory over Lacy Clay Sanders supporters launch six-figure ad campaign explaining why they're voting for Biden MORE (I-Vt.) jokingly shared a satirical article on Tuesday that claimed he was holding a "secret campaign meeting" with 15,000 "working class donors."

The article from the satirical news site The Onion jokingly confirmed that the imaginary attendees were shuttled on luxurious "city buses" to the event, and sipped on "fountain drinks" with the senator.

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"This damning footage shows Sen. Sanders clandestinely mingling with thousands of representatives from the nursing, food service, and public education sectors, many of whom were apparently chauffeured to the event aboard city buses and enjoyed fountain drinks upon arriving,” reads the article.

Sanders shared the article on Twitter, writing: "No one was supposed to find out about this."

Sanders, a candidate for the 2020 Democratic Party nomination for president, is known for his campaign's large base of grassroots donors as well as his distrust of big donors.

His campaign announced last quarter that his was the first of any 2020 campaign to reach 1 million individual donors, making him the only 2020 Democrat with more campaign donations than President TrumpDonald John TrumpLincoln Project ad dubs Jared Kushner the 'Secretary of Failure' Pence: Chief Justice Roberts 'has been a disappointment to conservatives' Twitter bans Trump campaign until it deletes tweet with COVID-19 misinformation MORE.

“Our strength is in numbers, and that is why Bernie Sanders is the only candidate who is able to say his campaign will rely only on grassroots funding in both the primary and against Donald Trump. Like all campaigns we are beholden to our donors, and we’re proud to stand with one million working people," Sanders campaign manager Faiz Shakir said in September.