Obama:
The College Years
Remembering the values of empathy and service that his mother taught him, Barack put law school and corporate life on hold after college and moved to Chicago in 1985, where he became a community organizer with a church-based group seeking to improve living conditions in poor neighborhoods plagued with crime and high unemployment.
The group had some success, but Barack had come to realize that in order to truly improve the lives of people in that community and other communities, it would take not just a change at the local level, but a change in our laws and in our politics.
He went on to earn his law degree from Harvard in 1991, where he became the first African-American president of the Harvard Law Review. Soon after, he returned to Chicago to practice as a civil rights lawyer and teach constitutional law. Finally, his advocacy work led him to run for the Illinois State Senate, where he served for eight years. In 2004, he became the third African American since Reconstruction to be elected to the U.S. Senate.
http://www.barackobama.com/learn/meet_barack.phpObama taught Constitutional law!Biden:
After graduating from the University of Delaware in 1965 and from law school at Syracuse University in 1968, Biden moved back to the Wilmington area and set up his own law firm. He practiced law until 1972.
In 1970, Biden – at age 27 – ran for New Castle County Council and won in a Republican district. At age 29, he launched an improbable bid to unseat two-term Republican U.S. Sen. J. Caleb Boggs. With very little help from the state establishment, and with his sister as his campaign manager, Biden defeated Boggs by 3,162 votes.
http://www.barackobama.com/learn/meet_joe.php Biden has served in Congress since 1970, Hands on experience, knowledgePalin:
I never really set out to be involved in public affairs, much less to run for this office. My mom and dad both worked at the local elementary school. And my husband and I, we both grew up working with our hands.
http://www.johnmccain.com/about/governorpalin.htmShe didn't want to get involved in public affairs? This was all I could find on the site that mentions her education.