Donald Trump has been mocked in an editorial by a Pulitzer Prize winner, who asked “just who the hell do you think you are”.

Leonard Pitts Jr was responding to the executive orders issued by the US President, his slating of the media and the declaration by Mr Trump's adviser Stephen Miller’s that “powers of the president” will “not be questioned”.

“What you do ‘will not be questioned?’ Lord, have mercy," the 59-year-old, wrote in his nationally syndicated column in the Miami Herald newspaper.

“That's the kind of statement that, in another time and place, would have been greeted with an out-thrust palm and a hearty ‘Sieg heil'", said the American, author of Becoming Dad: Black Men and the Journey to Fatherhood, and Before I Forget.

Leonard Pitts Jr also accused FBI director James Comey and Vladimir Putin of giving Donald Trump a little help YouTube (YouTube)

Mr Pitts, who won the Pulitzer Prize for Commentary in 2004, added: "Here in this time and place, however, it demands a different response," he added. “Just who the hell do you think you are?”

He addressed his letter to “Mr So-Called President”, a reference to Mr Trump’s smearing of the federal judges who temporarily blocked his immigration ban.

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He went on to accuse the FBI director James Comey and Russian president Vladimir Putin of aiding Mr Trump’s journey to the White House.

The Californian also added the election victory “does not entitle you to do whatever pops into your furry orange head”.

"Let's be brutally clear here. If you were a smart guy with unimpeachable integrity and a good heart who was enacting wise policies for the betterment of all humankind, you'd still be subject to sharp scrutiny from news media, oversight from Congress, restraint by the judiciary ¬– and public opinion," he said.