Biography: Charles Ernest Grassley (born September 17, 1933) is an American politician serving as the president pro tempore emeritus of the United States Senate, and the senior United States senator from Iowa, having held the seat since 1981. In 2022, he was reelected to his eighth Senate term, having first been elected in 1980. He is the longest serving Republican in U.S. Senate history, having overtaken Orrin Hatch’s record in January 2023. He is also the sixth-longest-serving U.S. senator in history.