Senator Chris Murphy (D-Conn.) is delivering remarks on the U.S. Senate floor on gun violence following the recent shootings of a 16-year old boy who mistakenly knocked on the wrong door in Kansas City, Missouri; a 20-year-old woman who mistakenly drove up the wrong driveway in Hebron, New York; and two teenage cheerleaders who mistakenly got in the wrong car in Elgin, Texas.