108th Senate — GGUM scores
GGUM ideal point estimates for the 108th Senate (members scored: 100 of 100; max PSRF: 1.002).
Download
Download S108-ggum-scores.csv — 100 members, 25 columns (Voteview metadata + GGUM θ, θ SD, PSRF).
Off-diagonal members
The following 2 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 |
|---|---|---|---|---|---|
| MILLER | D | GA | +0.15 | +1.18 | +0.66 |
| McCAIN | R | AZ | +0.38 | +0.77 | -0.60 |
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.
GRAHAM. Graham is commonly viewed as a Gang-of-14 bipartisan dealmaker who co-sponsored climate legislation with McCain and Lieberman around this period. GGUM places him as the third-most conservative senator in this Congress.
BYRD. Byrd is commonly viewed as a long-tenured West Virginia institutionalist, not among the chamber’s most liberal members. GGUM places him at the left floor in this Congress only; adjacent terms place him in the mid-30s/40s percentile.
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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.