"We've endured too many of these tragedies in the past few years, and each time I hear the news, I react not as a president but as everybody else would, as a parent. And that is especially true today. I know there's not a parent in America who doesn't feel the same overwhelming grief that I do. Our hearts are broken today for the parents and grandparents, sisters and brothers of these little children and for the families of the adults who were lost. Our hearts are broken for the parents of the survivors as well, for as blessed as they are to have their children home tonight, they know that their children's innocence has been torn away from them too early and there is no way to ease their pain." — President Obama
"Evil visited this community today." — Connecticut Gov. Dannel Malloy
"The horror of this day seems unbearable, but we will lock arms and unite as citizens, for that is how Americans rise above unspeakable evil. Let us all come together in God's grace to pray for the families of the victims, that they may find some comfort and peace amid such suffering." — House Speaker John Boehner, Ohio Republican
"As a parent and a public official, my heart and prayers are with these innocent victims, their families, and the entire community. I share the shock of all Connecticut at this hideous, horrific crime of inhuman violence. " — Sen. Richard Blumenthal, Connecticut Democrat
"Americans are sick and tired of these attacks on our children and neighbors and they are sick and tired of nothing being done in Washington to stop the bloodshed. If we do not take action to address gun violence, shooting tragedies like this will continue. As President Obama said, we must act now 'regardless of the politics.'" — Sen. Frank R. Lautenberg, New Jersey Democrat
"It was horrendous. Everyone was in hysterics — parents, students. There were kids coming out of the school bloodied. I don't know if they were shot, but they were bloodied." — Sandy Hook Elementary parent Brenda Lebinski, whose daughter was in the third grade at the school.