Newtown shooting killed two elementary students , jolted the nation . Obama proposed tougher gun control measure , which failed in the Senate . Focus has shifted to states ; both sides in the debate are represented . Recall of legislators in Colorado , midterm elections took place in 2014 .
Newtown shooting killed 20 elementary students , jolted the nation . Obama pursued tougher gun control measure , which stalled in the Senate . Focus has shifted to states ; both sides in the debate are energized . Recall of legislators in Colorado , midterm elections color issue in 2014 .