Who's Really in Charge at the US Supreme Court?

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Today's decisions on lethal injections, EPA regulations and Congressional gerrymandering don't match the drama of Obamacare or same-sex marriage. But they do illustrate a familiar pattern. Only one Justice was in the majority all three times: Anthony Kennedy. This has also been a year of increasingly open conflict between Kennedy, Antonin Scalia and Chief Justice John Roberts. Looking forward to next year, is a conservative court becoming more liberal or is ideology giving way to practicality?