Klain, a former top aide to Biden when he was vice president, replied to a 2014 Vox headline which read: “68% of Americans think elections are rigged.”

“That's because they are,” the political operative wrote in response.

The Democrat’s years-old post went viral late on Wednesday amid President Donald Trump’s continuing claims that massive voter fraud has seemingly caused him to lose the November 3 election.

Unsurprisingly, Klain’s tweet attracted plenty of attention from angry Trump supporters, who immediately used it as proof of Trump’s argument that the election was rigged against him.

“Even Biden's Chief of Staff knows elections are rigged,” one person tweeted. “I wonder if this media will ask about this,” pondered another one.