America's sudden change of heart on same-sex marriage

The big picture: Just 27% of Americans supported same-sex marriage in 1996, the year President Clinton signed the Defense of Marriage Act, which denied federal recognition to same-sex marriages.

Driving the news: The Senate voted 61-36 on Tuesday to codify the rights to same-sex marriage and interracial marriage into federal law.

The House is expected to quickly follow.

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