Billionaire Icahn Steps Down as Trump Adviser
Some Democratic lawmakers and biofuels advocates had argued that Icahn's policy recommendations to the Republican administration created a conflict of interest with his businesses, including oil refining company CVR Energy Inc.
Icahn denied any conflict of interest.
"I chose to end this arrangement (with your blessing) because I did not want partisan bickering about my role to in any way cloud your administration," Icahn wrote in a letter to Trump released on his website.
Icahn's departure came after a flurry of changes at the White House. Trump on Friday fired his chief strategist Stephen Bannon, two days after disbanding two high-profile business advisory groups.