Composite score - coming soon
Chuck Grassley
U.S. Senator · Iowa
- Republican
- Since 1975
- Tenure: 4+ terms
Refreshed 19 h ago
As of 2026-10-19 · Methodology 2026.10.1Contact info
Capitol office
135 Hart Senate Office Building Washington DC 20510
202-224-3744
District offices
Cedar Rapids · Council Bluffs · Davenport · Des Moines · Sioux City · Waterloo
View all contact info
- Official website
- Biographical Directory of Congress
- GovTrack
- Capitol office: 135 Hart Senate Office Building Washington DC 20510 · 202-224-3744
- 111 7th Avenue SE, Box 13, Suite 6800, Cedar Rapids, IA, 52401 · 319-363-6832
- 2146 27th Avenue, Suite 550, Council Bluffs, IA, 51501 · 712-322-7103
- 201 W. 2nd St., Suite 720, Davenport, IA, 52801 · 563-322-4331
- 210 Walnut St., 721, Federal Building, Des Moines, IA, 50309 · 515-288-1145
- 320 6th St., 120, Federal Building, Sioux City, IA, 51101 · 712-233-1860
- 531 Commercial St., 210, Waterloo Building, Waterloo, IA, 50701 · 319-232-6657
Evidence & sources
U.S. Senate roll-call votes
Votes and participation (senate.gov)
Congress.gov bill records
Sponsored and enacted bills
congress-legislators
Terms, committees, offices
Stale, last successful update 2026-10-23
View all sourcesExplore this record
Scorecard
Voting Record
71.2/ 100
Ranked 11 of 52 in the Senate majority
Voting Record
71.2/ 100
How this score is calculated:
Roll calls cast
891 of 905 while seated (98.5%)
51st percentile in cohort · 30 % weight
Substantive bills sponsored
67 of 67 sponsored · 96.1 points
80th percentile in cohort · 70 % weight
Bills enacted
0 sponsored · 7 cosponsored
8 passed a chamber · 3 reported · 56 introduced
Promise Adherence
0 of 5 promises scored
Collecting data - coming soon
Promise Adherence
0 of 5 promises scored
How this score is calculated:
Reviewed promises
0 scored of 5 needed
0 promises from 0 sources this term
Days in office this term
1,399 days (180 needed)
Promise capture coverage
0 of 3 source kinds settled
What counts toward promise adherence
0 promises from 0 sources for this term · 0 scored · 0 aspirational, displayed but not scored. Scores start at 50 and move with evidence.
The adherence score is withheld until every check below is met; it never shows a zero for missing evidence.
- Not yet 5 scored promises · 0 of 5 so far
- Met 180 days in office · 1399 days so far
- Not yet Complete capture coverage · 0 of 3 source kinds settled
Capture checklist
The source kinds searched for this term's promises, so the score never rests on whichever promises happened to be collected.
- Not yet captured Campaign issues page
- Not yet captured Announcement or acceptance speech
- Not yet captured Debate transcript or candidate questionnaire
Weights and floors are methodology parameters; see how these are computed.
What counts toward effectiveness
67 substantive bills sponsored · 7 cosponsored bills enacted · 891 of 905 roll calls cast. Points by the furthest stage each sponsored bill reached: introduced 1, reported 2, passed a chamber 4, enacted 8; the highest-scoring bills are listed.
- S 736: Lieutenant Osvaldo Albarati Stopping Prison Contraband Act · furthest stage floor pass (4 points)
- S 856: Disclosing Foreign Influence in Lobbying Act · furthest stage floor pass (4 points)
- S 825: Fighting Post-Traumatic Stress Disorder Act of 2025 · furthest stage floor pass (4 points)
- S 162: Recruiting Families Using Data Act of 2025 · furthest stage floor pass (4 points)
- S 2677: A bill to expand the sharing of information with respect to suspected violations of intellectual property rights in trade. · furthest stage floor pass (4 points)
- S 3977: Bankruptcy Threshold Adjustment Act of 2026 · furthest stage floor pass (4 points)
- S 960: Justice for Murder Victims Act · furthest stage floor pass (4 points)
- S 4460: Rural Community Hospital Demonstration Program Reauthorization · furthest stage floor pass (4 points)
Roll-call attendance by session
- Senate 119-1: 655 of 659 roll calls cast, 4 not voting
- Senate 119-2: 236 of 256 roll calls cast, 10 not voting, 10 recorded leave of absence
Public opinion polls
The published surveys behind the Approval Rating, each with its pollster, dates and sample; job approval and favorability are different questions and are labeled as such.
No public approval survey on record for this office.