What would happen if Obamacare was actually struck down?

[Skill and Chance]

Depends heavily on whether it is completely struck down with no corrective action from congress at all (short term economic disaster, basically ensures a big Dem victory in the next presidential election and some version of single payer within 5 years) or partially struck down/congress reaches an agreement to restore some of it(ranging from no economic impact if only the mandate is struck to moderate impact if several of the insurance regs are struck).  It seems likely the appeals court will sever at least some of Obamacare even if it agrees with the district court on the merits.  If preexisting conditions/lifetime limits/essential medical benefits go with the mandate, that would still be a big deal though. 

Honestly, there is no way Roberts does anything more than strike the mandate by itself, and the same is probably true of Kavanaugh given that he literally gave Roberts the template to uphold it as a tax when he was on the DC circuit.  So there would be a lot of drama, but this likely ends up 6/3 to either uphold everything or strike only the mandate and sever everything else.