Best and worst chief executives. We hear from author rosen, Michael Gearhart and from Robert Strauss. His book is worst president ever about james buchanan. [ applause ] ladies and gentlemen, welcome to the National Constitution center. I am Jeffrey Rosen, the president of this wonderful institution and this is such a happy day to celebrate the great collaboration between the National Constitution center and cspan. Cspan has an inspiring nonpartisan mission to bring unfiltered information about the u. S. Government to american citizens, and that coincides with the National Constitution centers mission which i now want all of you to recite along with me to inspire our guests and our cspan viewers. The National Constitution center is the National Constitution center is the only institution in america chartered by congress to disseminate information about the u. S. Constitution on a nonpartisan basis. Beautiful. That was so well done. [ applause ] i was so thrilled when my friend and coll