WASHINGTON — Donald Trump’s campaign fired a staffer Sunday after it was reported the aide made racist rants on Facebook.

Sam Nunberg, a political adviser for the GOP front-runner, was ousted two days after Business Insider reported a series of offensive posts allegedly made by him.

In one 2007 post, the Rev. Al Sharpton’s daughter is called a “N—!” Another post, in 2009, calls President Obama a “Socialist Marxist Islamo Fascist Nazi Appeaser.”

Nunberg denied writing the posts.

“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 told CNN.

Meanwhile, on Sunday, Trump threatened to run as an independent if his fellow Republicans don’t play nice.

“If I’m not treated fairly by the Republican Party, I very well might consider that,” Trump said on ABC’s “This Week.” “And I would certainly not give that up.”