Which American statesman used the pseudonym Richard Saunders?

The pseudonym Richard Saunders was used by Benjamin Franklin, primarily in his publication of "Poor Richard's Almanack." Franklin adopted this name to convey wisdom and wit through the character of a fictional persona. The almanac became famous for its proverbs, practical advice, and humor, which reflected Franklin's values and philosophy. His use of a pseudonym allowed him to engage with a wider audience and deliver his messages in an accessible format.

While Thomas Jefferson, John Adams, and George Washington made significant contributions to American history and political thought, they did not employ the pseudonym Richard Saunders in their writings or public discourse. This distinction makes Franklin the correct answer in this context.