US President Donald Trump’s top economic adviser Gary Cohn is resigning, the White House has said.
It is the latest in a series of high-profile departures from President Trump’s team.
There has been speculation that Cohn, a supporter of free trade, was angered by Trump’s plans to impose tariffs on aluminium and steel imports.
In a statement released by the White House, Cohn said it had been “an honour to serve my country”.
The 57-year-old former president of the Goldman Sachs bank had helped Mr Trump push through his sweeping tax reforms late last year.
Gary Cohn and President Trump were never believed to be close.
Cohn wasn’t specific about the reasons, saying in a statement it had been “an honour to serve my country and enact pro-growth economic policies to benefit the American people, in particular the passage of historic tax reform”.
Once that mission had been achieved, a number of differences may have prompted the departure, including the possible looming trade tariff war and his differences on that issue with trade adviser Peter Navarro and Commerce Secretary Wilbur Ross.
Cohn had reportedly set up a meeting between Trump and business executives who opposed the tariffs move. But Trump pulled out of that meeting and on Tuesday reportedly asked Mr Cohn in the Oval Office to back the tariffs publicly. Cohn did not answer, sources told Bloomberg.
In August last year, Cohn had also criticised Trump over his reaction to a far-right rally in Charlottesville, Virginia, saying the administration “can and must do better”. He was reported to have drafted a resignation letter after the event.
An official said: “For several weeks Gary had been discussing with the president that it was nearing time for him to transition out.”
The exact departure date had yet to be determined.
In a statement, Trump said: “Gary… did a superb job in driving our agenda, helping to deliver historic tax cuts and reforms and unleashing the American economy once again.
“He is a rare talent and I thank him for his dedicated service to the American people.”
Analysts were pointing to the resignation of Cohn, a free market advocate, as one reason behind a drop in shares across Asia on Wednesday. The Nikkei closed 0.77% down and the Hang Seng 1.03%.
Rick Meckler of LibertyView Capital Management told Reuters that Cohn was “very credible” and the resignation announcement “certainly causes short-term downward pressure”.
The dollar continued its retreat against the yen, down from 113 at the start of the year to 105.6 on Wednesday.
European stocks also opened lower, the FTSE 100 and pan-Europe STOXX 600 falling about 0.5% after opening.