When Lin-Manuel Miranda wrote the smash hip-hop Broadway musical Hamilton, he included a nod to this earlier musical about the founding fathers, by referencing the lyric “Sit down, John” – a salute to this 1972 musical movie’s opening song. The movie stars Williams Daniels as John Adams, with Howard Da Silva as Benjamin Franklin and Ken Howard as Thomas Jefferson, and is all about the summer of 1776, when politicians sat through a sweltering summer and argued the merits, and dangers, of trying to form a more perfect union.