Why reconciliation exists in Congress
The Senate filibuster requires 60 votes to end debate on most legislation, making passage of partisan bills nearly impossible when parties are evenly divided. Reconciliation was created in 1974 as a procedural escape hatch, allowing budget-related legislation to pass with a simple 51-vote majority. This creates a powerful incentive for both parties to route spending and tax changes through reconciliation whenever possible.
The process is limited to bills that directly affect federal revenues, mandatory spending, or the debt ceiling. This restriction prevents senators from using reconciliation to bypass the filibuster on non-fiscal matters, preserving the supermajority requirement where its framers intended it to apply.
The parliamentary structure and timeline
Reconciliation begins when Congress adopts a budget resolution that instructs committees to propose changes totaling a specific deficit impact. Committees then draft their portions, which are combined into a single bill. Because the reconciliation bill is tied to a predetermined fiscal target, debate and amendments are strictly limited compared to normal bills.
The entire process must complete within a set timeframe, typically 20 days of consideration. This tight schedule prevents extended filibusters and forces votes to occur even when minority opposition would normally delay indefinitely.