Justice Stevens is the oldest Justice on the Court. According to Wikipedia, he will be 90 years old on April 20th. The liberal Justice has served on the Court since 1975.
Supreme Court observers uniformly agree that whomever President Obama selects to replace Justice Stevens is unlikely to upset the Court's current ideological balance. That could occur in the future, however, if even one of the current conservative Justices ever leaves the Court during President Obama's term. What do you think about these developments?