Australia is one of the only developed English-speaking countries not to have legalised same-sex marriage.
Nikki Haley spoke out against same-sex marriage when she was governor of South Carolina.
Gallup first started polling Americans on the issue in 1996.
Airline chief Alan Joyce was one of 20 Australian business leaders to sign a letter in support of gay marriage in March.
The Church’s stance undermines our ability to speak with authority on other moral issues.
The presidency said on Twitter that Nieto had "announced the signing of a reform initiative which includes the recognition of the right to get married without any form of discrimination."
Chief Justice Roy Moore previously made national headlines for refusing to take down a Ten Commandments monument.
Argentina was the first Latin American country to take the step, in July 2010.
Only in the U.K. does the number of choices available to couples depend on sexual orientation.
Rebecca Steinfeld and Charles Keidan were told civil partnerships are for same-sex couples.
Davis served six days in prison for declining to issue same-sex marriage licenses.
Roy Moore said a ban on Alabama same-sex marriage licenses remains in effect.
The U.S. senator from Texas was recorded in a meeting with donors in New York.
Richard Dowling and Cormac Gollogly are the first gay couple to marry in Ireland.
The judge earlier this week said heterosexual couples are more fit to raise children.
Davis said she will allow her deputies to issue licenses despite her stance against U.S. Supreme Court.
The county clerk was jailed for refusing to issue marriage licenses to same-sex couples.
As the PBS film celebrates its 25th anniversary, how does America look back at the Confederacy?
Magistrates are being brought in from a neighboring county to perform marriages after four refused to do so.