The advocacy group Just Majority held an event to call attention to the Supreme Court's record on gun control since the shooting at Sandy Hook Elementary School in 2012.

Marco Rubio, Rick Scott, and Ron Johnson have shown little interest in one measure that has been demonstrated to reduce the number of mass shootings: gun law reform.

Siblings of victims of the Newtown shooting, as well as survivors of the tragedy, are stepping up their gun control activism as they grow up.