WASHINGTON  The departure of a number of administration officials is giving President Obama broader scope to remake his economic team even as the White House prepares to carry out a long-planned shuffle involving two of his closest political advisers.

Michael S. Barr, the assistant Treasury secretary who helped to develop and pass the law overhauling and tightening federal regulations of the financial industry, will be leaving after next week but remains a candidate to head the new consumer financial protection bureau next year, administration officials said Tuesday. Diana Farrell, the deputy director of Mr. Obama’s National Economic Council and another architect of the regulatory legislation, will leave at the end of the year, they said.

Ms. Farrell had taken herself out of contention to succeed her boss Lawrence H. Summers, who is stepping down as head of the National Economic Council and returning to Harvard at the end of the year, administration officials said. A former director at McKinsey & Company, Ms. Farrell is returning to the private sector though not necessarily to her previous employer.

The White House, which has strained relations with the business community, wants someone with business experience to succeed Mr. Summers.