Jan Crawford at the National Constitution Center (VIDEO)

Watch, an interesting segment, at CBS This Morning, "National Constitution Center tells the story of America":

The National Constitution Center in Philadelphia tells the story of how our founders created a government by the people with an elected president -- and a Constitution that endures and protects us all. Jan Crawford reports.

I don't think the question is whether we can "keep" the Constitution so much as we can preserve the liberty that it was originally designed to protect. The Constitution will be with us for a long time. It's how much the interpretation and practice of our constitutional norms have changed that's troubling.