First, here's the situation regarding the retirement outloook of the court:
Liberals:Stephens --> Nominated by Ford in 1975, he was born in 1920. He's been having some health issues lately, and his wife is constantly begging him to retire. Should he leave the court during a Republican presidency, look for the battle over his replacement to be very Nuclear (with a capital 'N')!
http://www.macon.com/mld/macon/news/politics/6158158.htmSouter --> Nominated by Bush I in 1990, he was born in 1939. (To my joyous surprise, he was the shock of the Bush I administration.) There are few rumors about him retiring anytime soon.
Ginsburg --> Nominated by Clinton in 1993, she was born in 1933. She's had cancer as her health issue, but there are few rumors of her retiring.
Breyer --> Nominated by Clinton in 1994, he was born in 1938. There are little-to-no rumors about him retiring soon.
ModeratesO'Connor --> Nominated by Reagan in 1981, she was born in 1930. There are consistent rumors about her retirement. It's pretty well-known that at a party on election night 2000, she muttered 'oh shit!' when Florida was initially announced for Al Gore.
Kennedy --> Nominated by Reagan in 1988, he was born in 1936. There are relatively few rumors about his retirement.
ConservativesRehnquist --> Nominated by Nixon in 1971, he was born in 1924. Rumors abound about his impending retirement.
Scalia --> Nominated by Reagan in 1986, he was born in 1936. Rabid Nazi. Sometimes rumors will crop-up about him retiring, and he often complains about the low pay, but sadly, he'll probably be there a while.
Thomas --> Nominated by Bush I in 1991, he was born in 1948. There are seldom rumors of his resignation.
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If, as I suspect, any one of the current nine candidates are prone to nominating justices in the mold of the liberal USSC justices, than any one of those nine would be FAR SUPERIOR replacements to the Chimp currently in charge.