H.R. 6238 — NIH IMPROVE Act

3%becomes law high confidencepending: House reported

NIH IMPROVE Act — would clear the House (95%) but only 15% to ever get the vote.

15%

reaches a floor vote

>99%

passes if voted (stage model)

23%

survives downstream

becomes law

The gap: on the floor this would pass — 95% by the member-vote simulation — but the floor is the hard part: 15% to ever get the vote. That gap, not the whip count, is the story.

If it reaches the floor

majority

Projected 322 yea of 430 voting; 90% interval 209–416 (quartiles 258–395). Intervals are backtest-verified to cover ~90%.

By floor procedure

No vote is scheduled, so the headline marginalizes over how the House would take it up; the branches:

Procedure	Likelihood	Projected yea	Passes
passage	38%	290 [194–413]	90%
suspension	62%	342 [219–417]	99%

Receipts

Sponsor: Lauren Underwood (D). Latest action (2026-05-21): Ordered to be Reported (Amended) by the Yeas and Nays: 46 - 0.
Full record: Congress.gov.

Forecast run predict-20260606T193507Z · models member-vote-1.0.0-t117d118-20260606 + passage-1.0.0-t117d118-20260606 · conditional whip forecasts for the Senate run at moderate confidence (why).