On March 31, 1870, Thomas Mundy Peterson of Perth Amboy, New Jersey, would become the first African American man to cast a ballot in the U.S. under the 15th amendment. Noelle Lorraine Williams, director the African American History Program and the Black Heritage Trail at the New Jersey Historical Commission, joined WNYC host Michael Hill. She says the telling of Mundy Peterson's story is often an incomplete picture of voting rights in the U.S.