US public opinion had shifted significantly over the years, from 27% approval of gay marriage in 1996 to 60% in 2015
the US House of Representatives also rejected a constitutional amendment to ban gay marriage by a vote of 227 to 186, 49 votes shy of the necessary two-thirds majority
Aug. 11, 2010, CNN released the results of the first national poll to show a majority support for gay marriage, with 52% agreeing that "gays and lesbians should have a constitutional right to get married and have their marriage recognized by law as valid”
June 26, 2015, the US Supreme Court ruled 5-4 that the US Constitution guarantees the right for same-sex couples to marry in all 50 US states.
June 26, 2015, 19 out of 194 countries allow same-sex couples to marry nationwide
June 26, 2003, the US Supreme Court ruled 6-3 in Lawrence v. Texas that sodomy laws were unconstitutional
Supreme Court of Hawaii’s 3-1 ruling on May 5, 1993 that the state could not ban same-sex marriages without "a compelling reason” to do so