Look at the ages of the justices! You need to rethink your position or, at least, learn about the power of the SCOTUS. Its not an even trade. Ginsberg is almost dead from cancer. We set a low benchmark for Sotomayor. The next nomination fight will happen within months. The Obama judges are YOUNG and will be on the court for decades. Conservative Judges are getting old and they won't be there as long. Read history...
One leftwingtard replacing another leftwingtard doesn't mean a thing. They're all the same.
If you are concerned with longevity, we get enough control of Congress we can IMPEACH and REMOVE any judge we wish, so that's what we have to do.
If we are truly blessed he'll appoint someone like Larry Tribe (68 years old I believe). He's becoming quite erratic and might even give us another Conservative vote from time to time, but odds are good he wouldn't survive any longer than Ruthy.
Obama really doesn't have any good young Leftwingtard candidates to serve on the USSC. The Democrat party's Special Interest politics requires him to nominate the old, the sick, the lame, the people dictated by the NEA or the united bombers unions.