Carol Sanger teaches family law at Columbia University Law School in New York City.

Barbara A. Babb is a family law professor at the University of Baltimore in Maryland. She has spoken on the legal issues involved with same-sex marriages.

Michael J. Klarman is a professor of law at Harvard University. He is an expert in constitutional law, constitutional theory and constitutional history.

Vikram Amar is a professor of law at the University of Illinois College of Law and an expert on constitutional law.

Michael C. Dorf is a professor at Columbia University Law School. He is an expert on constitutional law.

Jon W. Davidson is Legal Director at Lambda Legal, a national legal organization committed to achieving full recognition of the civil rights of lesbians, gay men, bisexuals, transgender people and those with HIV.

Ken Choe is Deputy General Counsel and Counselor to the Office of Health Reform at the Department of Health and Human Services. Before that, Choe was a Senior Staff Attorney at the LGBT Rights and AIDS Projects of the national ACLU. He also served as a political appointee in the Clinton Administration focusing on health care law and policy.

Rea Carey is executive director of the National Gay and Lesbian Task Force.

Kate Kendell is executive director of the National Center for Lesbian Rights.