Presidents in Waiting

"This exhibit focuses on the 14 U.S. vice presidents who became president though election, resignation of a president, or other means. Features essays about and images of the vice presidents who became presidents, and video interviews with four living vice presidents -- Dick Cheney, George H.W. Bush, Dan Quayle, and Walter Mondale -- on what it is like to be a 'president in waiting.' From the Smithsonian National Portrait Gallery." (From Lii.org)