This really says a lot about Trump's perspective when it comes to seniors, the poor, and the disabled. 
When a President selects an ambassador he makes sure he selects one with great knowledge and talent in countries he considers important. But he selects his campaign supporters for countries where he just doesn't care. So if one gets a career, talented ambassador, one knows that that country is important.

Now, Ben Carson's selection says Trump just doesn't care to select someone with knowledge of the complicated life at HUD, in fact, to me, this signals that Trump will be doing what he can to pull a "Reagan", use tax cuts to the rich to impoverish the low income seniors and disabled people who depend on HUD housing. 
So he has selected a woman to help destroy the Department of Public Education, and a black man to help destroy HUD. 
Diversity.
Time will tell if I am being too disrespectful and fearful. 
Hugh Massengill, Eugene