Mothers fighting against gun violence hope to repeat the success of Mothers Against Drunk Driving

During the Republican National Convention in Cleveland, mulling around at various rallies were Trump-supporting men with guns holstered at their hips or at their thighs, proudly talking about their constitutional right to bear arms. Guns are also on the mind of a different, but very visible contingent at the Democratic National Convention in Philadelphia: Clinton-backing women in bright red t-shirts that read: Moms Demand Action on Gun Sense in America.