When a new administration comes into power, they will have non-competitive political appointees in all agencies. These are the Schedule C appointees.

Toward the end of that administration, the Schedule C appointees try to get on Office of Personnel registers for competitive positions for similar jobs. This is called "burrowing in".

Does not make any difference whose administration you are talking about - same thing happens.

As far as pushing for any agenda, bullhockey. The burrowed in employees do their job as directed.