But the question is, do we care enough? Do we care enough to keep standing up for the country that we know is possible, even if it's hard, and even if it's politically uncomfortable? Do we care enough to sustain the passion and the pressure to make our communities safer and our country safer? Do we care enough to do everything we can to spare other families the pain that is felt here today?

The changes in thinking about same-sex marriage have come slowly at first and then in rapid course. If such change is possible in this area, is it also possible in the vexed and sordid realm of race relations?

Ask Osama bin Laden and the 22-out-of-30 top al-Qaida leaders who've been taken off the field whether I engage in appeasement. Or whoever is left out there, ask them about that.

I think the American people recognize is after a decade of war it's time to do some nation building here at home. And what we can now do is free up some resources, to, for example, put Americans back to work, especially our veterans, rebuilding our roads, our bridges, our schools, making sure that, you know, our veterans are getting the care that they need when it comes to post-traumatic stress disorder and traumatic brain injury, making sure that the certifications that they need for good jobs of the future are in place.

For the first time, preventing nuclear proliferation and nuclear terrorism is now at the top of America's nuclear agenda.

When it comes to preventing Iran from obtaining a nuclear weapon, I will take no options off the table. ... That includes all elements of American power: a political effort aimed at isolating Iran, a diplomatic effort to sustain our coalition and ensure that the Iranian program is monitored, an economic effort that imposes crippling sanctions and, yes, a military effort to be prepared for any contingency.

Whatever success I have achieved, whatever positions of leadership I have held have depended less on Ivy League degrees or SAT scores or GPAs and have instead been due to that sense of connection and empathy, the special obligation I felt as a black man like you to help those who need it most, people who didn't have the opportunities that I had because there, but for the grace of God go I. I might have been in their shoes. I might have been in prison. I might have been unemployed. I might not have been able to support a family. And that motivates me.