It would be the International Protecting Girls by Preventing Child Marriage Act of 2010. A proposed law that would designate marrying a child a human rights violation and develop strategies to prevent such marriage around the world. Mary Robinson and Desmond Tutu have praised the US because they thought this was going to pass. The Senate approved it by unanimous consent. And the House GOP decided to vote en masse against it.
Source:
http://www.huffingtonpost.com/2010/12/17/house-republicans-block-
child-marriage-prevention-act_n_798...
Source:
http://www.huffingtonpost.com/2010/12/17/house-republicans-block-
child-marriage-prevention-act_n_798...