U.S. Senate · Iowa

Sen. Chuck Grassley

Republican Serving since Jan. 5, 1981Term ends Jan. 3, 2029
Compare Official website ↗
Votes with own party 99% 2 pts above expected Lower than 32 of 53 Senate Republicans Votes with the President 100% About as expected 100% on legislation only Bipartisan bills led 98 More than 91% of Senate members Liberal-to-conservative rank 57thpercentile in all of Congress · 16th percentile among Republicans

Where they sit

Seated by voting record in the Senate. Percentiles run from 0 (most liberal) to 100 (most conservative).

How this is measured →
Grassley
← Most liberalThe aisleMost conservative →
Votes with DemocratsCrosses party linesVotes with Republicans

Chuck Grassley's seat is marked. Seats run from most liberal (left) to most conservative (right). Color shows how often each member crosses party lines toward the middle on votes that divide the parties: solid blue or red means almost never, and purple means on at least 1 in 10 of those votes. Gray seats are members too new to score. How this is measured

All of Congress57thpercentile
More conservative than 56% of all members of Congress.
Most liberalMost conservative
229th most conservative of 531
Republicans in Congress16thpercentile
More liberal than 84% of Republicans in Congress.
Most liberalMost conservative
44th most liberal of 272
The Senate52ndpercentile
More conservative than 51% of Senate members.
Most liberalMost conservative
49th most conservative of 100

This score measures who votes with whom. A member who votes no because a bill goes too far, or not far enough, can look more moderate than their views.

With their party and with the President

How this is measured →
Votes with own party
99%
Q1 2025: 99% → Q3 2026: 100%

Lower than 32 of 53 Senate Republicans.

Actual99%
Expected98%
Difference+2 pts

Expected is the typical score for senators of the same party whose states voted like this one for president in 2024.

Democrats Republicans 65%100%

Each line is one Senate member, grouped by party. The dot is Chuck Grassley. The dark line is what we'd expect given how this state voted for president in 2024.

On 819 votes that split the partiesReal votes only: 99%See the 819 votes
How this is measured
Votes with the President
100%all votes
Q1 2025: 100% → Q3 2026: 100%

Highest of all 53 Senate Republicans.

Actual100%
Expected99%
DifferenceAbout the same

Expected is the typical score for senators of the same party whose states voted like this one for president in 2024.

Democrats Republicans 0%100%

Each line is one Senate member, grouped by party. The dot is Chuck Grassley. The dark line is what we'd expect given how this state voted for president in 2024.

Based on 306 votes100% on legislation onlySee the 306 votes
How this is measured

Where they broke ranks

Votes where Chuck Grassley went against most of their party or against the President's stated position.

Every vote

Every roll call in the Senate this Congress, with how Chuck Grassley voted, how their party voted and the President's position.

DateVoteTheir voteMost of their partyPresident wantedResult
Loading…

A dash means the parties didn't split on that vote, or the President took no public position before it. “Party-line” and “President took a position” list exactly the votes each score counts: the ones cast Yes or No. Missed votes don't count either way and are under “Missed”.

Votes most like

Chuck Grassley and Joni Ernst voted the same way on 99% of votes.

Iowa

Iowa's delegation →

How Iowa voted for president in 2024

Harris 42.7%Trump 56.0%

Contact

Phone
202-224-3744
Office
135 Hart Senate Office Building Washington DC 20510
Contact form
www.grassley.senate.gov

Issue by issue

How often Chuck Grassley votes with their party, and with the President, on each kind of issue. Issues are the policy areas Congress assigns to each bill. "With their party" counts only votes where most Democrats and most Republicans voted on opposite sides; "With the President" counts only votes where he took a public position first.

Chuck Grassley sides with their party least often on Armed Forces and National Security (80%).

Chuck GrassleyAverage for Senate Republicans
  1. Armed Forces and National Security 80%Average 95% · 10 votes
  2. Economics and Public Finance 98%Average 96% · 168 votes
  3. Nominations 100%Average 100% · 445 votes
  4. International Affairs 100%Average 97% · 30 votes
  5. Immigration 100%Average 96% · 34 votes
  6. Environmental Protection 100%Average 100% · 18 votes
  7. Finance and Financial Sector 100%Average 97% · 19 votes
  8. Public Lands and Natural Resources 100%Average 99% · 15 votes
  9. Energy 100%Average 100% · 13 votes
  10. Government Operations and Politics 100%Average 99% · 13 votes
  11. Congress 100%Average 100% · 13 votes
  12. Transportation and Public Works 100%Average 100% · 12 votes
  13. Foreign Trade and International Finance 100%Average 94% · 6 votes
  14. Taxation 100%Average 99% · 7 votes

Fewer than 5 party-line votes, so not charted: Sports and Recreation (4 votes), Health (4 votes), Emergency Management (2 votes), Science, Technology, Communications (2 votes), Education (2 votes), Crime and Law Enforcement (1 vote), Families (1 vote).

Bipartisan bills led

12 passed their chamber · 0 became law

How this is measured →
How far each bill got:IntroducedPassed one chamberPassed both chambersBecame law

Votes: Voteview (UCLA). Bills: Congress.gov. President's positions: our public list. 2024 results by district: The Downballot. How this is measured · Corrections

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