Barack Obama: “Michelle and I wish to express our deepest condolences on the passing of Mrs. Ann Nixon Cooper.”

In forming our union, the founders fell terribly short of the Declaration's promise, leaving slavery intact, allowing states to restrict the franchise to white men who owned property.

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

While we are non-partisan, we are not value-neutral. We have a point of view.

Of course, we did not accomplish everything we set out to do. No administration does. Some of the exhibits reflect unfinished business, in some cases, my own shortcomings and mistakes, in some cases because - as a sign I kept on the…