Charles Ernest "Chuck" Grassley (born September 17, 1933) is the senior United States Senator from Iowa (1981–present). A member of Republican Party, he previously served in the served in the United States House of Representatives (1975–1981) and the Iowa state legislature (1959–1974). He was chairman of the Senate Finance Committee from January to June 2001 and from January 2003 to December 2006. He is currently the ranking Republican on the Judiciary Committee.
Grassley was born in New Hartford, Iowa, the son of Ruth (née Corwin) and Louis Arthur Grassley, and graduated from the town high school. At Iowa State Teachers College (now the University of Northern Iowa), he earned a B.A. in 1955 and an M.A. in 1956. He also completed some doctoral studies in political science at the University of Iowa. Also during the 1950s, Grassley farmed and worked in factories, first as a sheet metal shearer and then as an assembly line worker.
Grassley represented parts of Butler County in the Iowa House of Representatives from 1959 until 1974, when he was elected to the United States House of Representatives, where he served three terms.