The quote "If we list the set of rights, some fools in the future are going to claim that people are entitled only to those rights enumerated and no others" attributed to the 1787 Georgia delegation is fictional.
During Congressman Lillienfield's press conference, he mentions some names of former White House staffers. One name included was Rumsfeld, who had staffed for Presidents Nixon and Ford prior to this episode. He was later named to the cabinet, again, under President George W. Bush.
Ken Howard plays Judge Peyton Cabot Harrison III, a candidate for the nomination to be Associate Justice of the Supreme Court of the United States, who believes that there is no right to privacy contained in the constitution because it wasn't specifically enumerated. In 1776 (1972) he played Thomas Jefferson who later commented to James Madison (who was concerned that if specific rights where listed, others would be construed not to exist) that "[h]alf a loaf is better than no bread. If we cannot secure all of our rights, let us secure what we can.")
Diana Morgan & Charles Noland were credited as playing unnamed reporters. Their characters were identified by name in later episodes.