115th Senate — GGUM scores
GGUM ideal point estimates for the 115th Senate (members scored: 104 of 105; max PSRF: 1.018).
Download
Download S115-ggum-scores.csv — 105 members, 25 columns (Voteview metadata + GGUM θ, θ SD, PSRF).
Off-diagonal members
The following 3 members fall more than 2.5σ off the OLS fit of GGUM θ on W-NOMINATE dim-1. We flag these as diagnostic cases where the two scalings most disagree.
| Member | Party | State | nominate | GGUM θ | residual |
|---|---|---|---|---|---|
| GILLIBRAND | D | NY | -0.45 | -3.56 | -0.95 |
| CRUZ | R | TX | +0.78 | +1.55 | -0.89 |
| FLAKE | R | AZ | +0.85 | +1.86 | -0.88 |
Placements worth a second look
GGUM’s placement of the following members differs from what their established political reputations might lead a reader to expect. We draw attention to these cases so that researchers can consider them before using the estimates for a particular analysis; we are not alleging error.
GILLIBRAND. Gillibrand is commonly viewed as a mainstream progressive Democrat. GGUM places her near the extreme-left end of this chamber’s range, 2nd-most-left of 104 senators and among the most left-leaning placements in the full 40-chamber release.
CRUZ. Cruz is commonly viewed as among the most conservative Republicans in the Senate. GGUM places him in the upper portion of the Republican range in this chamber, 9th-most-conservative of 54 Republicans, just below the handful of most extreme members.
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The prose on this page was drafted with Anthropic’s Claude Opus 4.7, with plausibility audits by Claude Sonnet 4.5 subagents. The author edited and reviewed throughout.