Supreme Court Justices acknowledge there is a change in U.S. opinion on marriage but they may have differing opinions about why and what should be done about Prop 8 and DOMA. Elizabeth Birch, Former president of the Human Rights Campaign, Howard Dean, the first governor to sign a civil union bill, and Amy Howe of Scotusblog.com join MSNBC's Lawrence O'Donnell.March 29, 2013
