The size of John Hancock's signature on the Declaration of Independence is often referenced in popular culture, but it was the "Rob Morris" that had led the King to refer to as the "most damming name of all".

Immediately after serving in the Congress, Morris serves two more terms in the state legislature, from 1778 to 1781.

While he is in the Pennsylvania Assembly, Morris works on the constitution and legislation to restore checks and balances, and to overturn the religious test laws.

These had excluded from voting forty percent of the state's citizens, including Quakers, Jews, and Mennonites.