Roberts Akin to Souter?

Why are people like Sen. Lieberman and Sen. Clinton supportting John G. Roberts? I hope these left-wingers like Hilary don’t know something about Roberts that suggest a leftward shift akin to Justice Souter. But for now John Roberts seem like a true conservative and we all should back him. He is religious, we know for sure that his wife is a pro-lifer and we know he is pro-market. And most importantly, we know he will interpret the Constitution and not create new laws like what the Super Legislator Court has been doing for 30 years now. Hilary is probably continuing her fake move to the right to confuess the American people that she's not a socialist scumbag that she really is by supportting a real pro-America conservative.