Salaries are being significantly reduced. Carson’s traveling entourage will shrink to only a handful of advisers. And instead of flying on private jets, Carson may soon return to flying on commercial flights…

Carson’s senior staff, which was restructured in late December after several advisers resigned, will not change, the campaign said. Retired Army general Robert F. Dees, Republican consultant Ed Brookover and communications advisers Jason Osborne and Deana Bass will stay, among others.

Longtime Carson confidant Armstrong Williams said the drastic shake-up has been under consideration for weeks but was postponed until after Monday’s Iowa caucuses, where Carson finished in fourth place with 9.3 percent of the vote.

“Dr. Carson is going to get his campaign lean – really lean,” Williams said in an interview. “One issue for a while has been too much infrastructure and he has decided to fully address it so that he can sustain his campaign until the convention.”