The President does not have power under the Constitution to unilaterally authorize a military attack in a situation that does not involve stopping an actual or imminent threat to the nation.

We have to ensure free and open exchange of information. That starts with an open internet. I will take a backseat to no one in my commitment to network neutrality. Because once providers start to privilege some applications or websites over others then the smaller voices get squeezed out and we all lose. The internet is perhaps the most open network in history, and we have to keep it that way.

Today, about 40 percent of America's carbon pollution comes from our power plants. There are no federal limits to the amount those plants can pump into the air. None. We limit the amount of toxic chemicals like mercury, and sulfur, and arsenic in our air and water, but power plants can dump as much carbon pollution into our atmosphere as they want. It's not smart, it's not right, it's not safe, and I determined it needs to stop.

Peace depends upon compromise among peoples who must live together long after our speeches are over, long after our votes have been tallied.

The problem was, and we saw some of this in the immigration-reform issues as well, was they hadn't done sufficient homework to know that I didn't have all the capacity they thought I did in order to just execute this through the stroke of a pen.

Our enemies are also seeking the abilities to sabotage our power grid, our financial institutions, our air traffic control systems.

The forces that divide us are not as strong as those that unite us.