So, are you saying that Trump does not need Congressional approval shut down these departments?
Well if the departments are unconstitutional which they are, and Trump can make a reasonable constitutionally-based argument showing such, then I see nothing in the Constitution that would prevent him from shutting these blood-sucking cabinet departments down.
Not sure of the Congressional role in the creation of these cabinet departments. If they have some role and there’s some reason to think they should be included in their dismantling, then Trump should at least try to get it through Congress I guess. But if Congress refuses and he has a strong case for each department being unconstitutional, then he has a strong case for shutting them down even without Congressional support and he should do it.
Remember the Supreme law of the Land is the Constitution and ONLY those federal laws PURSUANT to the Constitution are valid laws (Art VI, Cl 2, U.S. Constitution).
My understanding is that these various agencies are all under the Executive branch. They are funded by Congress, but the President/Executive has the power to appoint his Cabinet. Each Cabinet officer has a department, hence an agency (or two or three) under him. It is my understanding that the Prez can eliminate these.... however, back in the 60’s and 70’s, the Excecutive may have enlisted Congress to make law establishing them, so may need another to abolish.
I believe it is true that Congress has supposed “oversight” function over the Executive agencies. (Which they have failed to exercise.)
It is also my understanding that Congress has its own agencies and bureaucracies which adds another layer. However, I could certainly be wrong about that.