A leading professor of international politics has backtracked on his call for young Republicans disinclined to work with Donald Trump's administration to give the 45th President of the United States a chance.

After meeting with members of Mr Trump's transition team, Professor Eliot A Cohen from Johns Hopkins University reversed his original position by saying that working for the billionaire businessman could mean "compromising one’s integrity and reputation".

Professor Cohen said he experienced an unpleasant encounter over the phone with a senior member of Mr Trump's team, who allegedly vented his fury at all those who had opposed the Republican nominee.

In response, he announced his disappointment on Twitter, stating: "After exchange with Trump transition team, changed my recommendation: stay away. They're angry, arrogant, screaming "you LOST!"

A national security expert, Professor Cohen had signed two anti-Trump foreign policy letters before election night. After Mr Trump's victory, however, he decided to help promote working in a new Republican White House in eight years.

Writing in The Washington Post, Professor Cohen said: "I am a national security Never-Trumper who, after the election, made the case that young conservatives should volunteer to serve in the new administration, warily, their undated letters of resignation ready. That advice, I have concluded, was wrong.

Trump gets public reality check from Barack Obama

"The tenor of the Trump team, from everything I see, read and hear, is such that, for a garden-variety Republican policy specialist, service in the early phase of the administration would carry a high risk of compromising one’s integrity and reputation."

A former counsellor to Secretary of State Condoleeza Rice during George W Bush's Presidency, Professor Cohen said the President-elect's team was likely to be comprised largely of "yes men" .

He said: "Trump was not a normal candidate, the transition is not a normal transition, and this will probably not be a normal administration.

"The President-elect is surrounding himself with mediocrities whose chief qualification seems to be unquestioning loyalty.

"He gets credit for becoming a statesman when he says something any newly-elected president might say and then reverts to tweeting against demonstrators and The New York Times."

The appointment of far-right white nationalist Steve Bannon as chief White House strategist and senior counsellor has inspired severe criticism not just from Democrats but also from the Republican establishment.

Donald Trump's most controversial quotes Show all 14 1 /14 Donald Trump's most controversial quotes Donald Trump's most controversial quotes On Isis: "Some of the candidates, they went in and didn’t know the air conditioner didn’t work and sweated like dogs, and they didn’t know the room was too big because they didn’t have anybody there. How are they going to beat ISIS?" Getty Donald Trump's most controversial quotes On immigration: "I will build a great wall — and nobody builds walls better than me, believe me —and I’ll build them very inexpensively. I will build a great, great wall on our southern border, and I will make Mexico pay for that wall. Mark my words." Reuters Donald Trump's most controversial quotes On Free Trade: "Free trade is terrible. Free trade can be wonderful if you have smart people. But we have stupid people." PAUL J. RICHARDS | AFP | Getty Images Donald Trump's most controversial quotes On Mexicans: "When Mexico sends its people, they’re not sending their best. They’re sending people that have lots of problems. They’re bringing drugs. They’re bringing crime. They’re rapists." Getty Donald Trump's most controversial quotes On China: "I just sold an apartment for $15 million to somebody from China. Am I supposed to dislike them?... I love China. The biggest bank in the world is from China. You know where their United States headquarters is located? In this building, in Trump Tower." Getty Images Donald Trump's most controversial quotes On work: "If you're interested in 'balancing' work and pleasure, stop trying to balance them. Instead make your work more pleasurable." AP Donald Trump's most controversial quotes On success: "What separates the winners from the losers is how a person reacts to each new twist of fate." Donald Trump's most controversial quotes On life: "Everything in life is luck." AFP Donald Trump's most controversial quotes On ambition: "You have to think anyway, so why not think big?" Getty Images Donald Trump's most controversial quotes On his opponents: "Bush is totally in favour of Common Core. I don't see how he can possibly get the nomination. He's weak on immigration. He's in favour of Common Core. How the hell can you vote for this guy? You just can't do it." Reuters Donald Trump's most controversial quotes On Obamacare: "You have to be hit by a tractor, literally, a tractor, to use it, because the deductibles are so high. It's virtually useless. And remember the $5 billion web site?... I have so many web sites, I have them all over the place. I hire people, they do a web site. It costs me $3." Getty Images Donald Trump's most controversial quotes On Barack Obama: "Obama is going to be out playing golf. He might be on one of my courses. I would invite him. I have the best courses in the world. I have one right next to the White House." PA Donald Trump's most controversial quotes On himself: "Love him or hate him, Trump is a man who is certain about what he wants and sets out to get it, no holds barred. Women find his power almost as much of a turn-on as his money." Getty Images Donald Trump's most controversial quotes On America: "The American Dream is dead. But if I get elected president I will bring it back bigger and better and stronger than ever before and we will make America great again." GETTY

Mr Bannon, who is chairman of right-wing news website Breibart News, has been accused of making anti-Semitic remarks and using Breitbart to push a "white ethno-nationalism agenda" - a former colleague wrote in The Daily Wire.

Professor Cohen said Bannon was not the only problem member of Mr Trump's team. He said: "No band of brothers this: rather the permanent campaign as waged by triumphalist rabble-rousers and demagogues, abetted by people out of their depth and unfit for the jobs they will hold, gripped by grievance, resentment and lurking insecurity.