I don't think so. Roberts does not believe in the "Lost Constitution" doctrine (Scalia and Thomas). Instead, he says, "I don't have an overarching, uniform philosophy.", which means that he will respect the Congress as well as a lot of precedents. In short, he will not help the other conservative members of the Supreme Court, to reject "affirmative action" and abortion. On many issues (apart from business ones), he will agree with Kennedy. Which is not very conservative...
allow me to reiterate what C's Wife said, Roberts is unquestionably more conservative than O'connor. that is a given. Upon what do you base your understanding of Roberts' judicial philosophy, ALessandro?
Aren't there some conservative groups opposing Roberts' nominations? It seems like I saw something on it.