Maybe it’s wishful thinking, but will Chief Justice Roberts become the next Justice Blackmun?  There is a tendency for SCOTUS justices to move to the left over the years.  They aren’t reliant upon political support as they’ve reached the top and can remain there for life if they want – and they are daily exposed to intelligent thought and high levels of discourse.  Blackmun, Brennan, Souter, O’Connor, and even to a limited degree Scalia who did move away from the perennial cop position on search and seizure are all examples.