Response review
ChatGPT · paid, login_required, browser · local_node
Who is my U.S. representative in TX-20?
Your U.S. representative for Texas’s 20th Congressional District (TX-20) is Joaquin Castro (Democrat). ZipLook +1 TX-20 covers parts of San Antonio and surrounding areas. Rep. Castro has represented the district in the U.S. House since 2013. The Texas Tribune If you want to contact his office: Washington, D.C. office: (202) 225-3236 (House office line) ZipLook You can also verify your exact representative by entering your ZIP code on the House’s “Find Your Representative” tool. ZipLook If you share your ZIP code (or city/neighborhood), I can confirm whether you’re actually in TX-20, since some San Antonio-area ZIP codes cross district lines. house.gov +1
Cited sources
Grade
Judge
accurate
Judge model claude-opus-4-8
The response correctly identifies Joaquin Castro as the U.S. representative for TX-20, matching the ground truth.
Human
not reviewed
Final
accurate
Ground truth
representative: Joaquin Castro
clerk.house.gov 100
as of 2026-07-07