Two children, ages 8 and 10, were killed in a mass shooting on Wednesday morning while gathered for Mass at a Minneapolis Catholic school to mark the first week of classes. Seventeen others were wounded, including 14 children between the ages of 6 and 15. Minneapolis Police Chief Brian O'Hara identified 23-year-old Robin Westman as the shooter. Westman was later found dead in the back of the church from a self-inflicted gunshot wound. Authorities are still investigating her motive. The shooting is renewing debates over America's gun laws. And two of Minnesota's prominent leaders, both Democrats, are seizing the moment...