Steven Terner Mnuchin, a financier with deep roots on Wall Street and in Hollywood but no government experience, is expected to be named Donald J. Trump’s Treasury secretary as soon as Wednesday, sources close to the transition say. Mr. Mnuchin, 53, was the national finance chairman for Mr. Trump’s campaign. He began his career at Goldman Sachs, where he became a partner, before creating his own hedge fund, moving to the West Coast and entering the first rank of movie financiers by bankrolling hits like the “X-Men” franchise and “Avatar.” As Treasury secretary, Mr. Mnuchin would play an important role...
