"(March 5, 1815 -- October 16, 1888) John Wentworth was a teacher, mayor, writer, clerk, lawyer, editor, and American Politician. Wentworth was born in Sandwich, Carrol County, New Hampshire and moved to Chicago, Illinois in 1836. Wentworth contributed political articles to newspapers. He studied law and was admitted to the bar in 1841. He was the editor and manager of the Chicago Democrat and was appointed aide-de-camp to Governor Carling (1838). He was also a Republican mayor of Chicago from 1857 to 1863 and was a delegate to the State constitutional convention in 1861. He was elected as a Democrat to the 28th, 29th, 30th, and 31st Congresses (March 4, 1843 - March 3, 1851). He was also elected as a Democrat for the 33rd Congress from March 4, 1853 to March 3, 1855. He was finally elected as a Republican to the 39th Congress (March 4, 1865 - March 3, 1867). [Source: 'Biography Directory of the United States Congress 1774 - Present', available https://bioguideretro.congress.gov/Home/MemberDetails?memIndex=W000295]"
Illinois Delegation - United States Fourteenth Amendment & The Civil Rights Act of 1866