The Byrd Rule, adopted in 1985, is a procedural constraint named after the late Senator Robert C. Byrd of West Virginia to prohibit “extraneous” provisions from being tacked onto reconciliation bills, which are fast-tracked budget packages that allow legislation to pass with a simple majority, bypassing the 60-vote filibuster threshold.

Provisions related to food aid and the consumer-protection agency are set to get dropped from the final bill after “Byrd bath.”

The Senate's version of the One Big Beautiful Bill takes the shine off some of Trump's most popular promises. Here's why.