1: Roberts -- who shocked conservatives nearly three years ago by providing a pivotal vote to uphold Obamacare -- once again faces a judicial crossroads in a historic case . 2: Appeals courts nationwide have moved decisively toward supporting same-sex marriage , but a split at the appellate level helped propel the issue to the nation 's highest court , led by Roberts . 3: John Roberts is at judicial crossroads as high court to hear key same-sex marriage case .
1: a historic case 2: the issue 3: key same-sex marriage case