I believe that our national security lies not just in protecting our borders, but in bridging divides.

I believe that climate change represents one of the greatest threats to our national security and our planet.

I believe that wholeheartedly - that we have to maintain a strong national defense.

I believe in a strong national defense. But it's my belief that neither Iraq nor Afghanistan poses a threat to national security, and we shouldn't be involved in either area.

I believe that national sovereignties will shrink in the face of universal interdependence.

I believe that successfully addressing our national security needs while protecting our basic freedoms and civil liberties requires continual Congressional oversight, and I will continue to work to assert the role of this body in carrying out this grave responsibility.