Barack Obama: “the ultimate goal of nuclear security is advanced by minimizing highly-enriched uranium (HEU) in civilian use”

Every president here today, as different as we are, has tried our best to uphold the values that John McCain and Mitt Romney believed in no less than I did.

They're meant to remind us of who we can be, to remind us of what's possible, so we can forge ahead.

There’s no doubt that we are going through a period right now of disruption, polarization.

I thought this was the South Side of Chicago.