You can't pin Vietnam on Nixon.
Also, you're forgetting the Indian, well, the Indian everything, the Spanish American war, Grenada, Nicaragua, Panama, Chile, Iran and and I'm sure I'm forgetting many other things.
I don't see Roberts court getting close to any of these.
Just saying.
Edit: And for what it's worth, from a theoretical perspective, I can live with striking down of the mandate.
I'm a practical person and as I see it as an improvement over the current situation I would like to see it stand, but if you came to me and say - "I want to start a country from scratch, and we're going to put in our constitutions that the government can't force the citizens to buy a product from private for profit companies", I would be pretty okay with that.
So while I think that Roberts is a partisan shill, from a legal point of a view, I don't think such decision would be so radical.
But you know, I'm not a huge fan of the whole judicial review thing to begin with (and yeah, I apply it to Roe v. Wade as well).