And he has advocated single payer.
As mentioned elsewhere, with the exception of Harvard Law School-indoctrinated Cruz, Trump is a constitutionally low-information candidate like all the other candidates are imo. So Trumps supporters need to get him up to speed on the federal governments constitutionally limited powers, the power to regulate, tax and spend for INTRAstate healthcare purposes not among those powers. This is evidenced by the excerpts from Supreme Court case opinions below.
Regarding the Obamacare insurance mandate for example, note the fourth entry in the list below from Paul v. Virginia. In that case state sovereignty-respecting justices had clarified that regulating insurance is not within the scope of Congresss Commerce Clause powers (1.8.3), regardless if the parties negotiating the insurance policy are domiciled in different states.
”State inspection laws, health laws, and laws for regulating the internal commerce of a State, and those which respect turnpike roads, ferries, &c. are not within the power granted to Congress. [emphases added]” - Gibbons v. Ogden, 1824.
”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.
”Inspection laws, quarantine laws, health laws of every description [emphasis added], as well as laws for regulating the internal commerce of a state and those which respect turnpike roads, ferries, &c., are component parts of this mass.” -Justice Barbour, New York v. Miln., 1837.
” 4. The issuing of a policy of insurance is not a transaction of commerce [emphasis added] within the meaning of the latter of the two clauses, even though the parties be domiciled in different States, but is a simple contract of indemnity against loss.” - Paul v. Virginia, 1869. (The corrupt feds have no Commerce Clause (1.8.3) power to regulate insurance.)
”Direct control of medical practice in the states is obviously [emphases added] beyond the power of Congress.” - Linder v. United States, 1925.