I think Trump inherently understands state sovereignty since he believes in the concept of government at the local level. If I were on Trump’s staff, I would suggest he take a one day Cliff’s Notes class on the Constitution. I doubt very few in Congress who pledged to support it can even spell the word.
I summarize the Constitution with the following excerpts from Supreme Court case opinions. These excerpts clarify, in broad terms, powers that are prohibited to the feds.
“Congress is not empowered to tax for those purposes which are within the exclusive province of the States.” —Justice John Marshall, Gibbons v. Ogden, 1824.
”From the accepted doctrine that the United States is a government of delegated powers, it follows that those not expressly granted, or reasonably to be implied from such as are conferred, are reserved to the states, or to the people. To forestall any suggestion to the contrary, the Tenth Amendment was adopted. The same proposition, otherwise stated, is that powers not granted are prohibited [emphasis added].” —United States v. Butler, 1936.