Digby has this on Roberts: "In case anyone is wondering if Roberts really is a partisan hack or not, Jeffrey Toobin's book "Too Close To Call" sheds some light on that subject:

The president's first two nominations to the United States Court of Appeals for the District of Columbia curcuit --- generally regarded as the stepping-stone to the Supreme Court --- went to Miguel Estrada and John G Roberts Jr., who had played important behind-the scenes roles in the Florida litigation."

By the way, it's a great book.