This is a time when the United States should be standing tall. There is no other leader in the world today. We shouldn't be approaching conflicts as a team sport. We either get in an we lead and we do a good job, or you don't get in at all.

When America closes its doors, so does everybody else.

I'm a true native of the Bay Area.

It's a tribal state, and it always will be. Whether we like it or not, whenever we withdraw from Afghanistan, whether it's now or years from now, we'll have an incendiary situation. Should we stay and play traffic cop? I don't think that serves our strategic interests.

If we can't find cuts in the defense budget, we're not looking carefully enough.

Science is the process of crash testing ideas: you ram the idea head-on into a brick wall at 60mph, and knowledge is gained by examining the pieces. If the theory is solid, the pieces are from the wall. Then we build a bigger wall.

We're fighting an enemy that is far different than any we have got before. It's a nontraditional kind of war, and I think we need to step back, recalibrate how we go about protecting our borders and protecting our people, and resetting our position in the world.