Chuck Grassley has served as Iowa's senior senator since 1981, making him one of the longest-serving members of Congress and a powerful force in Republican politics. Known for his folksy communication style and prolific Twitter presence, he has built a reputation as a fierce defender of government transparency and accountability, particularly through his work on the Senate Judiciary Committee. A former farmer who still works his family's corn and soybean operation, Grassley has championed agricultural interests while also playing key roles in major legislation including tax reform and criminal justice reform. His tenure has spanned seven presidencies, and he has become known for his meticulous oversight work and willingness to challenge both parties when investigating government misconduct.