Answer:
because they die before they retire
Nixon stepped down in 1974, halfway through his second term, rather than face impeachment over his efforts to cover up illegal activities by members of his administration in the Watergate scandal.
Patrick Henry from Virginia was a strong critic of the constitution proposed in 1787. He was in favor of the strongest possible government for the individual states, and a weak federal government. Henry saw that the Constitution took away liberties. Virginia ended up being the 10th state to ratifying the US Constitution.
Does this help?