About
Chuck Grassley is an American politician who has served as the senior U.S. Senator from Iowa since 1981. A member of the Republican Party, Grassley is known for his long tenure and influence in the Senate. He has served as the president pro tempore of the United States Senate, holding the position from 2019 to 2021 and again starting in 2025. Throughout his career, Grassley has been involved in various committees and legislative initiatives, focusing on agriculture, finance, and government oversight.
Career Timeline
Farmer and Small Business
Grassley starts career farming and running small business.
Elected to U.S. House
Grassley elected, beginning career in federal politics.
Elected to U.S. Senate
Elected to the US Senate representing Iowa.
President Pro Tempore
Becomes President Pro Tempore of the Senate.
Becomes Pro Tempore Again
Reassumes the role after Republicans win back the Senate.
Iowa Senator
Continuing his long tenure as US Senator.
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Last updated: February 24, 2026