Republicans have used budget reconciliation twice since taking unified control in 2025, passing the One Big Beautiful Bill Act and the narrower Secure America Act focused on immigration enforcement. Senate efforts for a third package stalled in summer 2026 over internal disagreements on defense funding, election security, and Byrd Rule compliance, though the Budget Committee advanced another immigration-related measure in early October amid ongoing government funding talks. Narrow majorities, procedural constraints, and upcoming fiscal deadlines continue to shape prospects for additional party-line legislation before potential midterms or session end.