AmercianDreamer recommended two: Geoff Stone and Cass Sunstein, both of the University of Chicago. 
Sunstein was born in 1954 and clerked for Thurgood Marshall. He looks to be around the right age for a Supreme Court appointment. He also advised Senator Obama about the wiretapping. A passage from his editorial, “In about 20 minutes, he and I investigated the legal details. He asked me to explore all sorts of issues: the president's power as commander in chief, the Constitution's protection against unreasonable searches and seizures, the Foreign Intelligence Surveillance Act, the Authorization for Use of Military Force and more. Obama wanted to consider the best possible defense of what Bush had done. To every argument I made, he listened and offered a counterargument. After the issue had been exhausted, Obama said he thought the program was illegal, but now had a better understanding of both sides. He thanked me for my time. This was a pretty amazing conversation, not only because of Obama's mastery of the legal details, but also because many prominent Democratic leaders had already blasted the Bush initiative as blatantly illegal. He did not want to take a public position until he had listened to, and explored, what might be said on the other side.”

Geoff Stone was born in 1946, and clerked for William Brennan. He wrote a series of blogs about judicial philosophy. He also has an Obama connection. 

Please continue to nominate a few more, particularly if they have a relationship with Obama or Clinton. Thanks.