Nightly News | March 18, 2013
>>> hillary clinton getting attention tonight, though it wasn't totally unexpected. she now says she supports same-sex marriage. this comes just days after a prominent republican senator made the very same announcement, surprising his own party. i'll report on all of it tonight from nbc's christine welker in washington.
>> reporter: the former secretary of state declared her support of same-sex marriage on a website of a gay advocacy group .
>> i supported it personally and as a matter of policy and law.
>> reporter: it's a view that has evolved. here's her answer to a question of tim russer in 2004 .
>> i do not support gay marriage .
>> reporter: a statement she made during her 2008 presidential campaign. but while making a stake on political issues, she expanded benefits for same-sex domestic partners working at the state department and today asserted --
>> gay rights are human rights . a few years ago, bill and i celebrated as our own daughter married the love of her life, and i wish every parent that same joy.
>> reporter: mrs. clinton's announcement comes a week after the supreme court accepted a challenge to the federal marriage act , a law that describes marriage between a woman and a man. and she urged the court to overturn the law, which bill clinton signed in 1996 . in 2004 , only 40% of people supported same-sex marriage. the wall street journal poll in 2012 showed a majority in favor.
>> the world has transformed itself on this issue, including the political world .
>>> on sunday, rob portman came out in favor of same-sex marriage.
>> i now believe people have the right to get married.
>> reporter: a position most of his party opposed, but republicans launched a $10 million effort to reach minority voters.
>> we want to build our party, and we want to do it with bold strokes.
>> reporter: now, president obama has also changed his position, announcing his support of same-sex marriage last year, and a new poll just today shows 58% of americans agree. brian?
>> kristin welker at the white house for us tonight. kristin,