"I hear they have the votes, Larry!! Simply amazing."

The March 2010 email exchange between Kagan and Tribe raises new questions about whether Kagan must recuse herself from judging cases involving the health-care law that Obama signed–and which became the target of legal challenges–while Kagan was serving as Obama’s solicitor general and was responsible for defending his administration’s positions in court disputes.

According to 28 USC 455, a Supreme Court justice must recuse from “any proceeding in which his impartiality might reasonably be questioned.” The law also says a justice must recuse anytime he has “expressed an opinion concerning the merits of the particular case in controversy” while he “served in governmental employment.”