As president, I decided that a strong, confident America could advance our national security by engaging directly with the Iranian government. We've seen the results.

We continue to stand united with Germany and our NATO allies in our ongoing efforts to build peace and stability in Afghanistan.

At various periods in American history, people get pretty rambunctious when it comes to our democratic debate.

The changes in thinking about same-sex marriage have come slowly at first and then in rapid course. If such change is possible in this area, is it also possible in the vexed and sordid realm of race relations?

I said that America’s role would be limited; that we would not put ground troops into Libya; that we would focus our unique capabilities on the front end of the operation and that we would transfer responsibility to our allies and partners.

Certainly I've appreciated Angela Merkel as a partner.

There isn't anyone who can't serve ... nobody who can't help somebody else.