Charles Grassley was elected to the U.S. Senate in 1980, with 54 percent of the vote, ousting incumbent Democratic Sen. John Culver.
Grassley was re-elected in 1986, with 66 percent of the vote, defeating Democrat John P. Roehrick.
He won a third term in 1992 with 70 percent of the vote over state Sen. Jean Lloyd-Jones. In 1998, Grassley won a fourth Senate term defeating Democrat David Osterberg with 68 percent of the vote.
Before coming to the Senate, Grassley was elected to the U.S. House in 1974 and was re-elected in 1976 and 1978. Earlier, Grassley served in the Iowa House.