.........I dont know the answer to your question conclusively but I think that so called experts think it is impossible in the Senate.
I'm not talking about Democrats or Republicans per se. I'm talking about politicians who will do anything to stay in office, including support repeal of Obamacare Democratcare with a presidential veto override.
And speaking of Democratcare, are you freepers aware that, regardless what activist justices want everybody to think about the constitutionality of Democratcare, the Supreme Court had previously clarified the following. The states have never delegated to Congress, via the Constitution, the specific power to regulate, tax and spend for public healthcare purposes.
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.
If Sarah started talking about how the Supremes caved into Obama on Democratcare, "conservatives" winning supermajority control of Congress in 2014 elections might possibly turn out to be the easier way to possibly amend the Constitution.
I hope you are right on all counts!