Why It Matters
The Senate Armed Services Committee's closed markup of the FY2027 National Defense Authorization Act is where roughly $1.15 trillion in defense spending gets shaped: determining which weapons systems get funded, which military programs survive, and how the U.S. posture toward adversaries like China and Russia gets codified into law. But this year's markup arrives under an unusual structural tension: the Trump administration has split its $1.5 trillion defense vision across two legislative vehicles, with $350 billion routed through budget reconciliation.
That decision is forcing a fundamental question onto the Senate Armed Services Committee: what does the NDAA actually authorize when nearly a quarter of the administration's defense ambitions live somewhere else?
The Bigger Picture
The Trump administration's FY2027 defense budget request totals approximately $1.5 trillion, but only $1.15 trillion flows through the traditional NDAA process. The remaining $350 billion is being pursued through reconciliation, a move that Politico reported in April would require Republicans to "pass a large chunk of his defense proposal using the party-line reconciliation process to skirt the Senate filibuster and forgo bipartisan negotiations."
That structure puts the Senate Armed Services Committee markup in an awkward position. The SASC defense bill, being voted on June 11, governs the base $1.15 trillion, but the administration's larger defense priorities, including major modernization investments, are contingent on a separate partisan vote that hasn't happened yet. Federal News Network reported that Ranking Member Jack Reed and members of appropriations panels warned the reconciliation approach "could weaken bipartisan NDAA support," a concern that will shadow the closed session at 222 Russell.
The NDAA has passed with overwhelming bipartisan margins for 62 consecutive years. That streak is not guaranteed this cycle.
The House Moves First
The sequencing of this year's markups is tight. House Armed Services Committee Chairman Mike Rogers released the text of H.R. 8800, the House's FY2027 NDAA, on May 26, with the House markup scheduled for June 4. The Senate's closed business meeting on June 11 follows just one week later, meaning the SASC is working with awareness of the House's priorities as it drafts its own version.
The two chambers will ultimately need to reconcile their bills in conference, and the gaps between them (on topline numbers, specific program authorizations, and policy riders) will define the final shape of U.S. defense policy heading into FY2027. The Senate's version, once reported out of committee, becomes the foundation for those negotiations.
What's At Stake
The FY2027 defense authorization covers the full sweep of American military activity: procurement of aircraft, ships, and ground systems; research and development for next-generation weapons; operations and maintenance funding for bases and forces worldwide; and the personnel strength levels that determine how large the U.S. military actually is.
Committee Chair Roger Wicker has framed the strategic context in stark terms. After the SASC completed its FY2026 NDAA markup with a 26-1 bipartisan vote, Wicker declared: "Today, the United States is operating in the most dangerous threat environment we have faced since World War II." That posture, emphasizing what he called "reindustrialization and the structural rebuilding of the arsenal of democracy," is the lens through which the Mississippi Republican is approaching the FY2027 Senate defense hearing as well.
For the Democratic side, Reed and colleagues, including Sens. Tammy Duckworth, Elizabeth Warren, Mark Kelly, Tim Kaine, and Elissa Slotkin, face a strategic choice: engage constructively on a bill that authorizes only part of the administration's defense vision, or use the markup to draw sharp contrasts on the reconciliation structure, military personnel policy, and the administration's approach to alliances.
The Closed Session
The June 11 session is a closed business meeting, which is standard practice for the portion of the NDAA markup that addresses classified programs. Every NDAA includes a classified annex covering intelligence programs, nuclear weapons modernization, and other sensitive national security matters that cannot be debated in open session. The SASC also has a separate open full committee markup scheduled for June 10, suggesting the June 11 closed session is specifically for those classified provisions.
What happens in that room stays off the record, but the decisions made there on nuclear posture, intelligence community authorizations, and classified weapons programs are among the most consequential the committee makes all year.
The Bottom Line
The FY2027 Senate Armed Services Committee markup lands as Congress is simultaneously consumed by the reconciliation process, the "One Big Beautiful Bill" that carries the administration's tax and spending priorities, including the $350 billion in additional defense funding. If reconciliation stalls or fails, the NDAA's $1.15 trillion base authorization becomes the entirety of the FY2027 defense investment, a number that defense hawks in both chambers have signaled is insufficient to meet the administration's stated strategic ambitions.
The committee's 28 members, consisting of 15 Republicans and 13 Democrats, will negotiate behind closed doors over amendments, program cuts, and policy provisions before the bill is reported to the full Senate. The composition of the committee, spanning defense-focused members from both parties including Sens. Tom Cotton, Joni Ernst, Dan Sullivan, Deb Fischer, and Jim Banks on the Republican side, and Sens. Kirsten Gillibrand, Jeanne Shaheen, Angus King, and Jacky Rosen among Democrats, virtually guarantees that the markup will surface real disagreements (over spending levels, personnel policy, and the administration's unorthodox budget architecture) even in a room the public cannot enter.