How conservative is Chief Justice Rehnquist? Radical? Reactionary?
John Dean explains in Findlaw. He's the young lawyer in the Nixon White House who told Tricky Dick the game was up ("a cancer on your presidency") in Watergate, and gave us the expression "at this point in time," when he broke ranks under prosecution pressure and testified against CREEP, the Plumbers, and the president himself, helping in a big way to bring Pres. Richard "I'm not a crook" Nixon down.
So Dean is a Republican who knows what it means to be a conservative of one stripe or another. He worked with one of the most conservative bunches of all time.