Gay marriage has been a longtime wedge issue in the United States, but the pace of change has quickened in the last few months. Last month, Iowa and Vermont legalized same-sex marriage and last week, Maine became the fifth state to allow gay couples to wed; similar legislation is advancing in New Hampshire. Washington D.C. also got into the mix, voting last week to recognize same-sex marriages that have been performed in other parts of the United States. Joining us to talk about this latest round of legislation and to look ahead at whether this momentum could carry across the country is Suzanne Goldberg. She is a professor at Columbia Law School and the director of the Gender and Sexuality Law Program.