This is something that many people don't seem to be grasping.
POTUS has a long background in business and construction projects. The WH staff is going to rotate. People are brought in for a set of tasks and then dismissed when they have completed the contract so that the next contractor can be brought in.
Even the swamp creatures have their use. Contract them for the things you need them to do and can keep them from being able to become traitors. Then fire them before they start to swampify things.