The Iranian regime supports violent extremists and challenges us across the region. It pursues a nuclear capability that could spark a dangerous arms race and raise the prospect of a transfer of nuclear know-how to terrorists. Its president denies the Holocaust and threatens to wipe Israel off the map. The danger from Iran is grave, it is real.

If you look at sort of how politics has divided itself here in this country, the big divide right now is between urban areas, which have become increasingly Democratic, and rural or exurban areas that feel as if they're being ignored.

I can guarantee that not because I give Attorney General [Loretta] Lynch a directive. That is institutionally how we have always operated. I do not talk to the attorney general about pending investigations [On Hillary Clinton].

I was elected because I believed in what we call "grassroots politics," politics from the bottom up, not the top down.

And we can see the positive impacts right here at Solyndra. Less than a year ago, we were standing on what was an empty lot. But through the Recovery Act, this company received a loan to expand its operations. This new factory is the result of those loans.

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. As commander in chief, the president does have a duty to protect and defend the United States. In instances of self-defense, the president would be within his constitutional authority to act before advising Congress or seeking its consent.

One of the things you discover about being president is that there are all these rules and norms and laws and you got to pay attention to them.