Heck & here I was thinking that this was a law that was passed by both houses & signed by the Pres. then some lawyers, judges & such (even if not as knowledgeable as our own NEPA panel) but none the less able to use tax money to take it before the SCOTUS. Then they after much more tax money found it to be Constitutional, call it a tax, penalty, fee or whatever it is now the law but then again who am I to say, lets spend even more tax money to be able to avoid really doing what they are paid to do & run the damn country already & this time not into the ground.
Just as for all bills, the Obamacare bill was passed by both houses and then signed into law by the President, but for those bills that extract money from the people, they must always originate in the House Of Representatives, and this one did not.
The way the Constitution was originally set up the House Of Representateves (whom the people elected) represented the people, and the Senate represented only the interests of the States (who appointed them to their Senate positions, as they were not elected).
Only Amendments can change the Constitution, and again I must emphasise that there is no amendment repealing Article 1, section 7 of the Constitution.