Energy Department can go or downsized with someone in charge who actually looks out for America's domestic and international interests.
I'm no longer sure about Homeland Security, as I once opposed it. It has done good by making all LE agencies share intel. Prior to DHS, there were too many fiefdoms who didn't share enough intel. Numerous attacks have been averted because of intel sharing. The main responsibility of the Fedgov is to protect its citizens.
I'm also not sure why we need the Department of Agriculture. Could that be consolidate under the Department of the Interior?
I also question the need for the Commerce Department. Exactly what do they do? Maybe a agency that works within State Department, but a Cabinet position?
To repeat, HUD could be absorbed into the Health and Human Services (HHS).
Many agencies could be eliminated or consolidated into different departments.
I've read where Fedgov jobs work force is now larger than our manufacturing work force. Put these pencil-pushers to work in Trump's new factories or they can serve Happy Meals.
The Transportation Security Administration (TSA) should be eliminated because of their employee's rude, power-mad, fat idiots. The DHS or can hire private security contractors. They know how to get the job right. Think of all the combat Veterans who could do a better job. TSA is another fail of Fedgov.