He has spoken at the John F. Kennedy, Harry S. Truman, Franklin D. Roosevelt and Calvin Coolidge presidential libraries and museums, as well as at various universities, libraries, museums (including the Chicago History Museum, Dallas' Sixth Floor Museum, Palm Beach's Flagler Museum, and Reno's National Automobile Museum), and festivals. He has keynoted the annual birthday ceremonies at the graves of presidents Calvin Coolidge and Chester Alan Arthur and spoken at Wilton, New York's Grant Cottage, scene of the death of President Ulysses S. Grant.