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Tip the Scale Blue — election intelligence for 2026 progressives. Poll data from Ballotpedia. Ratings from Cook, Sabato, and Inside Elections.

Iowa · Senate

TBDvsChuck Grassley

Score updated Mar 4, 2026

389MONITOR

Priority Score Breakdown

Candidates

Chuck Grassley

Republican· Incumbent

Progressive votes: 0.75%

Joni Ernst

Republican· Incumbent

Progressive votes: 0.3%

War Chest (FEC)

Dem

—

Grassley

$302k

Cash on hand, most recent FEC filing.

Expert Ratings

Cook PoliticalCookLikely R

Sabato's Crystal BallSabatoLikely R

Inside ElectionsIELikely R

Iowa senate — Score 389 | Tip the Scale Blue