In a 2006 '' Washington Post '' interview , Garson said she was not seriously accusing Johnson of being complicit in the Kennedy assassination : " People used to ask me then , ' Do you really think Johnson killed Kennedy ? ' " Garson , now 65 , recalls . " I never took that seriously . I used to say to people , ' If he did , it 's the least of his crimes . ' It was not what the play was about . The plot was a given . " The play parodies aspects of Shakespearean tragedies including '' Macbeth '' , '' Hamlet '' , and '' Richard III '' , with Texas and Boston accents . The plot follows MacBird from the 1960 Democratic National Convention , when he becomes John Ken O'Dunc 's Vice President ( " Hail , Vice-President thou art ! " ) , to Ken O'Dunc 's assassination , at the urging of Lady MacBird . Robert Ken O'Dunc then defeats MacBird at the 1968 convention
1960 Democratic National Convention
1960 Democratic National Convention
MacBird!