Until this week, I thought they did, but now I’m not so sure. One decision is just one decision, but what a case! (I may be slightly biased because I have gone without health coverage for years, so I personally benefit greatly from this decision.)
The liberals (or the solidly center-left group, whatever label you want to assign them) have a tight bloc of four that doesn’t see much defection in the big cases. The conservatives have a bloc of three that are even tighter and extremely right wing. But that group of three, to get a majority. needs to get both Roberts and Kennedy to support their side, whereas the liberals only need to pick off one of the two. In game theory terms, I as a liberal (“progressive”) am not sure if I’d trade places with them (that is, for instance: trade Kagan for two justices who are the SCOTUS equivalents of Joe Lieberman and Ben Nelson).