I don't know very much about Elena Kagan other than that a couple of Harvard folks for whom I have a lot of respect think highly of her. When I look at
some of the lefties who are opposing her and
their reasons for doing so, however, I'm tempted to conclude that she's the most acceptable--from my perspective--candidate Obama is likely to put forward for the SCOTUS. You can tell a lot about a person from who their enemies are.