S. 850 — Northern Border Security Enhancement and Review Act

4%becomes law moderate confidencepending: Senate on_calendar

Northern Border Security Enhancement and Review Act — on the calendar, quiet for 215 days; 11% to reach the floor, 4% to become law.

11%

reaches a floor vote

99%

passes if voted (stage model)

32%

survives downstream

becomes law

The gap: on the floor this would pass — 62% by the member-vote simulation — but the floor is the hard part: 11% to ever get the vote. That gap, not the whip count, is the story.

If it reaches the floor

majority

60 (cloture)

Projected 68 yea of 100 voting; 90% interval 41–96 (quartiles 55–84). Intervals are backtest-verified to cover ~90%.

Filibusterable: the realistic Senate line is 60 votes — P(≥60) = 62% (simple-majority P = 89%).

By floor procedure

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

Procedure	Likelihood	Projected yea	Passes
conference	5%	73 [43–97]	92%
passage	95%	67 [41–96]	89%

Receipts

Sponsor: Margaret Wood Hassan (D). Latest action (2025-11-03): Placed on Senate Legislative Calendar under General Orders. Calendar No. 256.
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).