Same-sex marriage has been a contentious issue in American politics since the 1969 Stonewall Riots marked the beginning of the modern gay rights movement. There are many factors that influence individuals' views on same-sex marriage, including moral, religious, and gender role beliefs. Religion plays a large role in the debate, though people of the same faith often disagree. Politically, Democrats generally support same-sex marriage while Republicans have differing views. Ballot measures banning same-sex marriage in 2004 may have influenced voters in favor of Bush. Public support for same-sex marriage has increased in recent decades but opposition remains, especially in southern states.