• 
  Matthew Broderick

  Reader
• 
  Michael C. Hall

  Leonard Swett (voce)
• 
  David Strathairn
• 
  Cary Elwes

  John P. Jones
• 
  Sam Elliott

  Ward Hill Lamon
• 
  Dermot Mulroney

  Andrew Curtin (voice)
• 
  Lili Taylor

  Emily Souder (voice)
• 
  Gary Busey

  John C. Calhoun

• 
  William Fichtner

  John G. Nicolay
• 
  Victor Garber

  William Saunders (voice)
• 
  David Morse

  Abraham Lincoln
• 
  Aidan Quinn

  Theodore Parker
• 
  Keith David

  Frederick Douglass
• 
  Neal McDonough

  Charles Sumner
• 
  Lois Smith

  Elizabeth Crawford (voice)

• 
  Zachary Gordon

  Daniel Skelly
• 
  Edward Asner

  Edward Everett
• 
  Jason Alexander

  Noah Brooks
• 
  Gabor Boritt

  Himself
• 
  Tom Brokaw

  Himself
• 
  George W. Bush

  Himself (archive footage)
• 
  Kevin Conway

  Daniel Webster
• 
  Laura Bush

  Herself
• 
  Maxwell Perry Cotton

  Albertus McCreery (voice)
• 
  David W. Blight

  Himself
• 
  Chris Christie

  Himself (as Gov. Chris Christie)
• 
  Kelly Ayotte

  Herself (as Sen. Kelly Ayotte)
• 
  Jean Baker

  Herself
• 
  Bob Gunton

  William Herndon (voice)
• 
  George Takei

  Himself