A senior administration official

A senior administration official said on Tuesday that Mr. Geithner expected to stay on. But other top economics advisers are already gone. Peter R. Orszag quit as budget director earlier this year, and just this month Christina D. Romer, the administration’s chief economics forecaster, left to return to teaching at the University of California, Berkeley. And Rahm Emanuel, the White House chief of staff, is contemplating leaving to run for mayor of Chicago, adding to the expectation of a postelection shake-up.

“We are on a better path thanks in no small measure to Larry’s wise counsel,” Mr. Obama said in a statement on Tuesday. Just one day earlier, the president brushed off a question about the futures of both Mr. Summers and Mr. Geithner, saying he thought they both were doing an outstanding job.