The budget office sent a list this week of roles identified by its politically appointed leaders to the federal personnel agency for final sign-off. The list comprises 88 percent of its workforce — 425 analysts and other experts who would shift into a new job classification called Schedule F.

The employees would then be vulnerable to dismissal before Trump leaves office if they are considered poor performers or have resisted executing the president’s priorities, effectively turning them into political appointees that come and go with each administration.

The Office of Personnel Management is also rushing to shuffle many of its own roughly 3,500 employees into the new category, a senior administration official said. Other agencies are pulling together lists of policy roles, too — but the budget and personnel offices volunteered to be test cases for the controversial policy, this official said, speaking on the condition of anonymity to discuss internal administration deliberations.