The Defense of Marriage Act (DOMA) was a United States federal law passed by the 104th United States Congress and signed into law by President Bill Clinton on September 21, 1996. It banned federal recognition of same-sex marriage by limiting the definition of marriage to the union of one man and one woman, and it further allowed states to refuse to recognize same-sex marriages granted under the laws of other states.
Congressman Bob Barr and Senator Don Nickles, both members of the Republican Party, introduced the bill that became DOMA in May 1996. It passed both houses of Congress by large, veto-proof majorities. Support was bipartisan, though about a third of the Democratic caucus in both the House and Senate opposed it. Clinton criticized DOMA as "divisive and unnecessary". He nonetheless signed it into law in September 1996.