Kim Jong-Un is a dangerous leader, without a doubt. And both Republican and Democrat administrations have been completely ineffective in dealing with him. So we must continue to isolate him. We will need China as part of that strategy.

I don't give up on commitments until what I've been asked to do is clearly finished.

Margaret Thatcher once said, "If you want something talked about, ask a man; if you want something done, ask a woman."

When we miss with all the metadata collection we've had, the San Bernardino couple and the Tsarnaev brothers, what that suggests to me is that we are using the wrong algorithms to search through all this data.

I do not support Common Core because there is absolutely no evidence that a big, centralized bureaucracy makes anything better. In fact, there is a lot of evidence to the contrary.

I think more to the point, these pivotal times means something other than a politician. I understand the economy. I understand the world. I have a lot of foreign policy experience. I understand bureaucracies. I understand technology, and I understand leadership.

The truth is, I'm proud of the life I've lived so far, and though I've made my share of mistakes, I have no regrets.