Earlier this month, I was invited by the White House to watch President Obama nominate Solicitor General Elena Kagan to serve on the Supreme Court. The ceremony was even more moving than I expected, and that took me a little by surprise. I had tears in my eyes for much of that morning ceremony in the East Room. If Kagan is confirmed, women will comprise one-third of the Supreme Court. That's a fraction that does not yet represent our proportion of the population — but it's a stake that was once unimaginable for me and most of my peers.