Accountability Score — composite of attendance, independence, bipartisan tone, ethics record & transparency.
Methodology
John Thune is a Republican Senator from SD. He has served 29 years in Congress across 7 terms. Based on his voting record, he is rated as conservative, voting with his party 34.9% of the time.
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Performance metrics for the current Congress
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2026 cycle · through 2026-03-31
SD · ACS 2023 estimates · These are the people this member represents.