Trump campaign manager Corey Lewandowski told the network that if confirmed to be true, advisor Sam Nunberg will be fired.

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"They were offensive and they do not reflect Mr. Trump's position and we take them very seriously," Lewandowski said. "If it determined that Mr. Nunberg made these statements, then he will no longer be part of the campaign."

Posts unearthed by Business Insider reportedly show Nunberg calling Rev. Al Sharpton’s daughter the n-word, calling President Obama a “Socialist Marxist Islamo Fascist Nazi Appeaser” and referring to the president as “Kenyan” and “Muslim.” Many of the posts date back to 2007 and 2008.

Nunberg denies writing the posts, according to CNN, saying that "I am not adept at social media.”

"I would also point out that all of these things were done before Mr. Trump's campaign, if I even did them — which I deny,” he added.