Marriage cases preview, Part 1: Standing in the way

Keen News Service: It is hard to overstate the potential impact of the upcoming U.S. Supreme Court cases concerning marriage for same-sex couples. The primary questions posed by the two cases—Hollingsworth v. Perry involving Proposition 8 and U.S. v. Windsor involving the Defense of Marriage Act—could lead to rulings that dramatically advance the equality of LGBT people under the law. But the Supreme Court may end up issuing no ruling in either case.  How is that possible?