Minnesota Democrats introduced a bill on Monday that would repeal the state’s Defense of Marriage Act, which prohibits same-sex couples from benefiting from the rights and responsibilities of marriage. The bill, the Marriage and Family Protection Act , was offered just as heated debate at the Capitol continues over a proposed constitutional amendment that would write a ban on gay marriage into the state constitution. “Marriage is a legal institution recognized by the state to promote stable relationships and to protect people in those relationships and their children,” the bill states