If John Roberts Jr. is confirmed to replace Sandra Day O'Connor, what will happen to the alliances and personal relationships on the Supreme Court? Mastering the Court's internal dynamics is a formidable challenge for any new justice, but would be especially daunting for Roberts, who would replace the fulcrum justice of a Court that has been unchanged for 11 years. But Roberts commands its immediate respect, based on his record: 25 wins out of 39 cases argued.
Details here from Tony Mauro of Legal Times via Law.com.