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Member brief · 119th Congress

Sen. Chuck Grassley

R · Republican · U.S. Senator, Iowa1

In Congress
Since 1975 · 51 years
 Next election
Nov 7, 2028
 Committee leadership
Chairman, Judiciary
Chairman, Social Security, Pensions, and Family Policy

CommitteesJoint: Taxation; Agriculture, Nutrition, and Forestry; Finance; Budget +2 more2

Participation3

97 / 100

Chamber median 98
891 of 915 roll calls

Party unity3

99 / 100

Chamber median 99
on 819 party-line votes

Cross-party agreement3

9 / 100

Chamber median 9
on 870 contested votes

Ideology score4

+0.36

Chamber median +0.32
−1 left · +1 right

Notable votes and votes by issue

In the full brief: five notable recent votes chosen by a fixed rule (most recent breaks with party first), each with the member’s vote, the party’s position and a source, plus how often Grassley votes with the party on each issue.

Full briefs are part of Oathstar Pro. Team plans add alignment with your own scorecard and your PAC’s giving.

Votes most like5

R Alan Armstrong OK 100% of 162
R James Lankford OK 99% of 865
R Pete Ricketts NE 99% of 862

Share of roll calls both voted on where they voted the same way.

Next race

Nov 7, 2028 · Seat next on the ballot in 20281

Data as of Oct 4, 2026 · votes through Sep 30, 2026 · Method: https://oathstar.com/methodology · Live profile: https://oathstar.com/member/chuck-grassley

  1. 1. Member record and terms: congress.gov; unitedstates/congress-legislators, retrieved 2026-10-04. www.congress.gov/member/G000386
  2. 2. Committees: unitedstates/congress-legislators, retrieved 2026-10-04. github.com/unitedstates/congress-legislators
  3. 3. Participation, party unity, cross-party agreement, votes by issue: Oathstar from Voteview roll calls, 119th Congress, retrieved 2026-10-04. voteview.com/person/14226
  4. 4. Ideology: DW-NOMINATE first dimension, Voteview, 119th Congress. voteview.com/person/14226
  5. 5. Votes most like: Oathstar from Voteview roll calls, 119th Congress. voteview.com/data

Prepared with Oathstar · oathstar.com

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