The nation's leading gun control group filed a "friend of the court" brief back in January defending the gun ban in Washington, D.C. But with the Supreme Court poised to hand down a potentially landmark decision in the case, the Brady Campaign to Prevent Gun Violence fully expects to lose."We've lost the battle on what the Second Amendment means," campaign president Paul Helmke told ABC News. "Seventy-five percent of the public thinks it's an individual right. Why are we arguing a theory anymore? We are concerned about what we can do practically."

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