WASHINGTON (AP) - The Supreme Court can choose from a wide array of outcomes in ruling on California's Proposition 8 ban on same-sex marriage and the federal Defense of Marriage Act.
The federal law, known by the shorthand DOMA, defines marriage as the union of a man and a woman and therefore keeps legally married gay Americans from collecting a range of federal benefits that generally are available to married people.
The cases will be argued Tuesday and Wednesday; rulings are not likely before late June.
The justices might come out with rulings that are simple, clear and dramatic. Or they might opt for something narrow and legalistic.
The court could strike down dozens of state laws that limit marriage to heterosexual couples, but it also could uphold gay marriage bans or say nothing meaningful about the issue at all.
Scroll through our timeline for a look at potential outcomes for the Proposition 8 case and then for the case about DOMA.