This senseless attack today in Tucson is a national tragedy, and all America mourns those who lost their lives in the very act of public service. I join the entire Congress in condemning this horrifying act of violence, and on behalf of the entire Senate family, Elaine and I extend our deepest expressions of sympathy and heartfelt prayers to Rep. Giffords and the families of those who have been killed or injured. The U.S. Capitol Police are joining local, state and federal officials in this investigation. We appreciate their quick response and stand ready to assist in their efforts. -Mitch McConnell