No more than a surgeon can operate while tweeting can you reach your potential with one ear in, one ear out. You actually have to reacquaint yourself with concentration. We all do.

If your aim is to attack the United States, it is hard to imagine a more difficult way of getting here than by posing as a refugee.

I'm relieved that after all these years of doing atrocity work, I still cry my eyes out every time I read the paper in the morning. It's surprising, actually.

President Reagan, of course, did more than any other person to entrench the Republican reputation for toughness on national security.

History is laden with belligerent leaders using humanitarian rhetoric to mask geopolitical aims. History also shows how often ill-informed moralism has led to foreign entanglements that do more harm than good.

Don't take for granted that the worthiness of your cause will win you allies; bring it down to a scale that people can relate to.