New Delhi, Feb. 4 -- Stephen Miran, one of President Donald Trump's top economists, has resigned from his leadership position at the White House's Council of Economic Advisers (CEA), drawing to a close an unusual dual role that straddled the executive branch and the US central bank.

According to a letter obtained by CNN, Miran stepped down from his post as chair of the CEA on Tuesday. His departure was first reported by Barron's and later confirmed by CNBC. The move fulfils a commitment Miran made to lawmakers during his confirmation process, underscoring the sensitivities surrounding institutional independence and governance norms in Washington.

In his letter dated Tuesday, Stephen Miran wrote that he had promised senators he would lea...