Response review
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Who are my U.S. senators in Iowa?
Iowa is represented in the U.S. Senate by: Chuck Grassley (Republican) — serving since 1981. He is Iowa's senior U.S. senator. Iowa Legislature +1 Joni Ernst (Republican) — serving since 2015. She is Iowa's junior U.S. senator. Iowa Legislature +1 If you're also looking for your U.S. House representative (which depends on where you live within Iowa), I can help identify that too.
Cited sources
Grade
Judge
accurate
Judge model claude-opus-4-8
The response correctly identifies both Iowa senators, Chuck Grassley and Joni Ernst, matching the ground truth.
Human
not reviewed
Final
accurate
Ground truth
senators: Joni Ernst, Chuck Grassley
senate.gov 100
as of 2026-07-14
https://www.senate.gov/general/contact_information/senators_cfm.xml