And we have so much work to do in America, because all across America, there are walls ... There's a wall around Washington, D.C. The American people are, today, on the outside of that wall. And on the inside are the big corporations and the lobbyists who are working to protect a system that takes care of them. ... There is another wall that divides us. It's the moral shame of 37 million of our own people who wake up in poverty every single day This is not OK. And for eight long, long years, this wall has gotten taller And there's also a wall that's divided our image in the world. The America as the beacon of hope is behind that wall. And all the world sees now is a bully. They see Iraq, Guantanamo, secret prison and government that argues that water boarding is not torture. This is not OK. That wall has to come down for the sake of our ideals and our security. We can change this. We can change it. Yes we can. If we stand together, we can change it. ... This is not going to be easy. It's going to be the fight of our lives. But we're ready, because we know that this election is about something bigger than the tired old hateful politics of the past. This election is about taking down these walls that divide us, so that we can see what's possible -- what's possible, that one America that we can build together.
Endorsement of Senator Barack Obama on May 14, 2008. 
Let me be clear: Under no circumstances can Iran be allowed to have nuclear weapons. ... To ensure that Iran never gets nuclear weapons, we need to keep all options on the table. Let me reiterate--all options must remain on the table.
Comments (via satellite) at the Seventh Annual Herzliya Conference in Israel.