He was elected as a Whig to the Thirtieth and Thirty-first Congresses, serving from March 4, 1847 to March 3, 1851.
Tom Harmon | Robert Harmon | Mark Harmon | Butch Harmon | Judson Harmon | Ernest Harmon Air Force Base | Darva Conger | Angie Harmon | Harmon Trophy | Richard Harmon | Raymond Salvatore Harmon | Millard Harmon | Larry Harmon | Jim Harmon | Fort Conger | Conger | Bob Harmon | Mount Harmon | Leon Harmon | Lauri Conger | John H. Harmon | Jerome "J-Roc" Harmon | James Harmon Brown and Barbara Esensten | Harmon Northrop Morse | Harmon Mister America | Harmon Craig | Everton Conger | Deborah Harmon | Dan Harmon | Clement Conger |
Then he moved to Macomb County, Michigan and laid out the town of Belvidere where he engaged in banking and mercantile pursuits until 1850.
Rich served in the Michigan Senate from January 1, 1881, until March 21, 1881, when he resigned, having been elected to the United States House of Representatives for the 47th Congress to fill the vacancy caused by the resignation of Omar D. Conger, serving from April 5, 1881, to March 3, 1883.
Among Gibson's early schoolmates were Anson Burlingame (diplomat), Consul Wilshire Butterfield (author and historian), O. D. Conger (U.S. Congressman and U.S. Senator from Michigan), and Charles Foster (35th Governor of Ohio and U.S. Secretary of the Treasury).