I know this feeling of heartbreak and horror too well. The massacre in Las Vegas is a grave tragedy for our nation. This must stop - we must stop this.

I am praying for the victims of this shooting, their families and friends. And I am so grateful for the heroism and professionalism of the first responders who acted so courageously to bring this horror to an end. I send the injured all my strength: you have a long road ahead. Be strong. You can do it. My heart is with the city of Las Vegas and all who were touched by this tragedy.

But I am praying for my former colleagues, our elected leaders, too. I am praying they find the courage it will take to make progress on the challenging issue of gun violence. I know they got into politics for the same reason I did—to make a difference, to get things done. Now is the time to take positive action to keep America safer. Do not wait. The nation is counting on you.