Lionel Heymann

President Harry S. Truman smiles for a group of photographers during a meeting at the Blackstone Hotel in Chicago, Illinois.

President Harry S. Truman (just to the right of the movie camera) smiles for a group of photographers during a meeting at the Blackstone Hotel in Chicago, Illinois. All others are unidentified.

President Harry S. Truman (facing camera, fifth from the right) smiles for a group of photographers during a meeting at the Blackstone Hotel in Chicago, Illinois. All others are unidentified.

President Harry S. Truman (second from the right) sits with Governor Adlai Stevenson (second from left) and two unidentified men at the Blackstone Hotel in Chicago, Illinois.

Postmaster General and Democratic National Committee Chairman Robert E. Hannegan (left) with unidentified men at a dinner at the Blackstone Hotel in Chicago., Illinois.

Postmaster General and Democratic National Committee Chairman Robert E. Hannegan (left) and Senator Scott W. Lucas (right) with an unidentified man at a dinner at the Blackstone Hotel in Chicago.

Postmaster General and Democratic National Committee Chairman Robert E. Hannegan (right) with two unidentified men at dinner at the Blackstone Hotel in Chicago.

Senator Scott W. Lucas (from l-r), Postmaster General and Democratic National Committee Chairman Robert E. Hannegan, Chicago Mayor Edward J. Kelly, and unidentified man at a dinner at the Blackstone Hotel in Chicago, Illinois.

Former President Harry S. Truman holds a press conference at the Sheridan-Blackstone Hotel in Chicago, Illinois. He was attending the Democratic National Convention in 1956.