LBJ

LBJ was a former President of the United States of America

Prior to Day 1, Elizabeth Nash was reading a biography of this president.

Background information and notes
"LBJ" most likely refers to Lyndon B. Johnson, who served as John F. Kennedy's Vice-President until his assassination on November 22, 1963. He took the Oath of Office as the 36th President of the United States two hours after Kennedy was shot. He served out Kennedy's term to 1964, then was reelected as President, serving until 1968.