Gun control agenda, and the supporters on cue:

[Updated at 4:07 p.m. ET] Mark Kelly, who's lived through this kind of horror, has issued a statement. He's the husband of former Congresswoman Gabby Giffords who was shot in the head at a massacre in Tucson, Arizona, in January 2011. Here's what he said:

I just woke up in my hotel room in Beijing, China, to learn that another mass shooting has taken place - this time at the Sandy Hook Elementary School in Connecticut. My thoughts and prayers are with the families of the victims and the entire community of Newtown, CT. I just spoke to Gabby, and she sends her prayers from Tucson.

As we mourn, we must sound a call for our leaders to stand up and do what is right. This time our response must consist of more than regret, sorrow, and condolence. The children of Sandy Hook Elementary School and all victims of gun violence deserve leaders who have the courage to participate in a meaningful discussion about our gun laws - and how they can be reformed and better enforced to prevent gun violence and death in America. This can no longer wait.