Rhode Island state Sen. Donna Nesselbush, right, embraces a supporter after the Marriage Equality Act gets signed into law at the State House in Providence on May 2, 2013. The Rhode Island act is set to become law August 1, and Delaware and Minnesota also recently passed legislation. Once these laws go into effect, 12 states and the District of Columbia will allow same-sex couples to wed. The U.S. Supreme Court is expected to hand down decisions in June in two same-sex marriage cases.