11 — Defense, Foreign Policy & National Security
Stage 1: EVIDENCE BRIEF
Referee panel: Prof. Olivia Brandt (#57, statistics, C) · Prof. June Takahashi (#17, econometrics, C) · domain specialist Prof. Dmitri Volkov (#33, national security, C-R)
Ground rules from the referees. Today is 2026-09-24. Figures are taken from the source as stated, with the year of the data. Where we could not verify a figure in this session we say so. One warning up front: in this domain, "the defense budget" means at least four different numbers. There is the NDAA authorization, the appropriation, the mandatory reconciliation money, and SIPRI's broader "military expenditure." Anyone who mixes them without saying so will be flagged. — OB
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A. Budget level and trend
- FY2026 NDAA topline: $890.6 billion for national defense. That is $8.0 billion above the President's $882.6 billion request. It was signed December 18, 2025 as P.L. 119-60. The CRS notes that it sits alongside the mandatory defense money in Title II of the 2025 reconciliation act (P.L. 119-21). — CRS IN12641 (2025)
- FY2026 defense appropriations were enacted January 30, 2026, four months into the fiscal year. The act gives $866.6 billion, which AEI describes as "$18 billion over the President's request." — AEI, McCusker & Ferrari (2026)
- 2025 reconciliation act (P.L. 119-21): $150 billion for defense. The Senate Armed Services Committee's allocation in the enacted version was $29B shipbuilding/maritime industrial base, $25B Golden Dome, $25B munitions (plus $5B critical-minerals supply chains), $16B drones/AI/low-cost weapons, $15B nuclear modernization, $12B Indo-Pacific, and $9B air superiority. — Breaking Defense (Jul 2025)
- DoD's 2026 request totaled $961 billion, including $113 billion from reconciliation. Most of the reconciliation share went to acquisition. Smaller amounts went to operation and support and to infrastructure "without corresponding decreases in base-budget funding." — CBO (Apr 30, 2026)
- FY2027 request: $1.5 trillion. That is about $1.15T discretionary national defense plus $350B DoD reconciliation. CSIS calls it a 24% real increase in discretionary funding and a 38% real increase overall versus FY2026. Outlays would go from 3.0% of GDP (FY26) to 3.6% (FY27), and budget authority would be 4.6% of GDP. — CSIS, Daniels (Apr 2026)
- CBO on the FY27 budget: total defense funding would rise "by $599 billion (or 66 percent) for 2027." Defense outlays would reach 3.4% of GDP in 2030 and then fall to 2.8% by 2036. CBO's current-law projection for 2036 is 2.4%. — CBO (Jun 2026)
- SIPRI 2025: world military expenditure was $2,887 billion, up 2.9% in real terms. The US spent $954 billion, 7.5% lower than in 2024, which was 3.1% of GDP (down from 3.4%) and about a third of the world total. SIPRI attributes the drop to the absence of supplemental money for military aid to Ukraine or Israel in 2025. — SIPRI press release; SIPRI fact sheet (Apr 2026)
- Other big spenders, 2025 (SIPRI): China was about $336B, up 7.4%, its 31st straight annual increase. Russia spent $190B, which is 7.5% of GDP. Ukraine spent $84.1B, about 40% of GDP. European spending rose 14% to $864B. Germany reached $114B (+24%, 2.3% of GDP). The 32 NATO members together spent $1,581B, 55% of the world total. — same sources
- CBO long-run cost growth: if DoD's costs grow at historical rates, the FYDP understates them by about 4% for 2025–29 ($154B) and 5% for 2025–39 ($677B). Under the FYDP, costs rise from $850B (2025) to $965B (2039) in 2025 dollars. — CBO (Nov 2024)
B. Procurement, sustainment, audit
- GAO 2026 Weapon Systems Annual Assessment: it covers 104 of DoD's costliest programs, worth over $2.4 trillion. "The overall average time frame to deliver a capability increased this year to over 12 years." Of 40 programs on the rapid "middle tier" pathway, 18 entered with immature technologies (2018–25). — GAO-26-108457 (Jul 2, 2026)
- F-35 sustainment: US-only lifecycle sustainment is estimated at $1.6 trillion (as of 2024). In FY2025 the fleet was 44% mission capable and 25% fully mission capable, against 2030 goals of 80% and 65%. Steady-state annual cost is $7.4M per F-35A against an affordability target of $6.8M. — GAO-26-108113 (Jun 11, 2026)
- Shipbuilding: the Navy "nearly double[d] its shipbuilding budget over the last 2 decades" without delivering more ships. Virginia-class Block V is producing at "about 60% of its annual goal" of two boats a year. Columbia is "delayed by at least a year" (as of Sep 2024). About $530M more is needed to finish the first two Block V boats. — GAO blog / GAO-25-106286 (2025)
- Submarine maintenance: about 15,000 operational days lost from 2016 to 2025. Sustaining idle crews and boats cost $3.4B, with another $3.1B projected for 2026–30. — Defense News on GAO-26-109256 (Aug 2026)
- Naval balance: CRS says the PLAN has a battle force of "over 370 platforms," expected to grow to 395 by 2025 and 435 by 2030. The US Navy had 296 battle force ships on Sep 30, 2024, projected at 294 by FY2030. — CRS RL33153 (Apr 2025)
- DoD audit, FY2025: this is the eighth consecutive failure since annual audits began in 2018. Auditors found 26 material weaknesses and 2 significant deficiencies. Reported assets are $4.65T and liabilities $4.7T. DoD "could not provide or obtain accurate and reliable data to verify the existence, completeness or value" of the F-35 Global Spares Pool. The target for a clean opinion is 2028, set by the FY24 NDAA. — Breaking Defense (Dec 2025); Military Times (Dec 2025)
- Nuclear forces: CBO projects $946B over 2025–2034 (about $95B a year). That is 25% ($190B) above its 2023 estimate. The drivers are Sentinel, Columbia, and NC3. Nuclear forces are 8.4% of the 10-year national defense plan. — CBO (Apr 2025)
C. Industrial base and munitions
- 155mm artillery: production was 36,000 rounds/month as of March 2026, up from 14,000. The original goal was 100,000/month by October 2025 and is now 140,000 by December 2027. The DoD IG found that metal-parts production is "the limiting factor." At the $469M Mesquite, TX line, "the contractor has been unable to produce any projectile metal parts that meet contract specifications." — Military Times (Jul 14, 2026)
- Iran war munitions and costs: the Secretary of Defense testified that the war had cost $37.5B as of July 21, 2026 (it was $29B in May). He requested $67.1B more, including $21B for munitions. 18 US service members had been killed and more than 440 injured. — Defense News (Jul 2026)
D. Alliances
- NATO Hague commitment (June 2025): allies agreed to spend 5% of GDP by 2035, made up of at least 3.5% on core defense and up to 1.5% on infrastructure protection, cyber, civil preparedness, and the industrial base. European allies and Canada went from 1.43% to 2.02% of combined GDP between 2014 and 2024. NATO says all allies are anticipated to meet 2% in 2025. — NATO (2025)
- Ukraine support: Europe sharply increased allocations in May–June 2026, allocating nearly €11B in two months through the new Ukraine Support Loan. "Europe continued to rely heavily on weapons from the United States." — Kiel Ukraine Support Tracker (update Aug 13, 2026)
E. Foreign aid
- USAID closed July 1, 2025. Its functions moved to State. About $120B in contracts were active in January 2025 and about $69B remained afterward, so roughly $51B was terminated or eliminated. — Donor Tracker (2025)
- Rescissions Act (July 2025): it clawed back $9B, of which about $1.1B was public broadcasting and most of the rest foreign aid. A Senate amendment protected $400M for PEPFAR. The House vote was 216–213. — NPR (Jul 18, 2025)
- Lancet (Cavalcanti et al., 2025): a panel of 133 countries associates USAID funding with 91 million deaths averted 2001–2021, a 15% lower all-cause mortality and 32% lower under-5 mortality. It projects over 14 million additional deaths by 2030, including 4.5M under-5s, if cuts persist. — UCLA summary of Lancet paper; Lancet01186-9/fulltext)
- PEPFAR: Gaumer et al. compared 90 recipient countries with 67 controls over 2004–2018. They estimate a 10–21% reduction in all-cause mortality, with shrinking marginal effects over time (7.6% → 5.5% → 4.7% by period). The authors flag an imperfect control group and endogeneity. — PLOS Global Public Health (Jan 2024)
F. War powers
- The FY26 NDAA repealed the 1991 and 2002 Iraq AUMFs. This was the first repeal of a war authorization since Tonkin Gulf in 1971. The 2001 AUMF remains in force. — Roll Call (Dec 2025)
- Iran timeline (CRS, updated Sep 18, 2026). Operation Midnight Hammer took place in June 2025. US-Israeli strikes began February 28, 2026. A ceasefire was agreed April 7, and a blockade was announced April 13. A June MoU collapsed. Limited strikes resumed in September. Oil went from $72.48 (Feb 27) to $118.35 (Mar 31). — CRS R48887
- Congressional votes on Iran. The Senate passed a war-powers resolution 50–48 on June 23, 2026 after 9 failed attempts; Republicans Murkowski, Collins, Paul and Cassidy voted yes. The House had passed a measure 215–208 on June 3. A new Senate resolution failed narrowly on Sep 24, 2026. — PBS (Jun 2026); Al Jazeera (Jun 2026); NPR (Sep 24, 2026) (headline only; we could not load the body)
G. People and cyber
- FY2025 recruiting: every active component met its goal. Army 62,050/61,000, Navy 44,096/40,600, Air Force 30,166/30,100, Marines 26,600/26,600, Space Force 819/796. The Army Reserve reached only 75%. The DoD IG found that the Army and Navy underreported initial test scores by counting post-prep-course results. — Military Times (Dec 2025)
- Volt Typhoon (CISA/NSA/FBI, Feb 2024): PRC actors are "pre-position[ing] themselves on IT networks for disruptive or destructive cyberattacks" in communications, energy, transportation and water, including Guam. In some victim networks they kept access "for at least five years." — CISA AA24-038A
- CSIS Taiwan wargame (2023): 24 iterations. In most of them the US, Taiwan and Japan defeated an amphibious invasion, but at the cost of "dozens of ships, hundreds of aircraft, and tens of thousands of servicemembers." The necessary conditions were Taiwan resisting, US access to bases in Japan, and long-range anti-ship missiles. — CSIS (Jan 2023)
- CBO budget options: "Reduce the Department of Defense's Annual Budget" would save $959B over 2025–34. Retiring the F-22 would save $29B, ending the Ford-class carrier $15B, and cancelling LRSO $15B. — CBO Options (Dec 2024)
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Contested evidence (where the literature genuinely disagrees)
(i) Is the US spending "a lot" or "too little"? At 3.1% of GDP (SIPRI) the burden is low by Cold War standards. At $954B it is also about a third of world spending and nearly 3x China's SIPRI estimate. Those two facts pull in opposite directions, and neither settles the question. The real disputes are about how much Chinese spending is understated at market exchange rates (PPP adjustments raise it substantially; we did not verify a specific PPP figure this session) and about US cost inflation. CBO's point in item 9 is that the same dollars buy less every year. — JT
(ii) Aid effectiveness: magnitude vs. sign. The Lancet panel (item 23) and Gaumer et al. (item 24) both find large mortality effects. Both are cross-country observational designs. Aid is not randomly assigned, and the Lancet's 14M projection assumes the historical association is causal and that no other donor fills the gap. An older critique by Mead Over of CGD (2009) showed how an earlier PEPFAR study relied on UNAIDS mortality projections that were built on assumptions about treatment efficacy, which makes it circular. CGD, Over (2009). The RCT evidence on antiretrovirals and bednets at the intervention level is strong. The program-level counterfactual is less certain. The honest reading is that the sign is not in doubt and the magnitude is. — OB
(iii) NATO compliance by definition. NATO says all allies are anticipated to reach 2% in 2025. SIPRI's independent series has 22 of 29 European NATO members at ≥2%. The two use different definitions, not different realities. The 1.5% "resilience" bucket in the 5% pledge is definitionally elastic. — OB
(iv) Recruiting recovery: demand or measurement? FY25 goals were all met. But the goals were set lower in some services after FY23 (we did not verify the goal history this session), and the IG found test-score reporting problems. Labor-market softening, prep courses and cultural factors all have advocates. None of these explanations has been properly identified. — JT
(v) Taiwan: denial vs. punishment vs. restraint. CSIS finds that deterrence by denial is feasible but ruinous. The same study says outcomes hinge on munitions stockpiles and base access, which is exactly where items 17–18 show strain. Wargames are structured judgment, not data, and we will treat them that way. — DV
(vi) The Iran war record. Official costs have been revised upward twice ($29B → $37.5B), and reported supplemental requests range from $38.3B to $67.1B to "roughly $80B" to $200B depending on the outlet and date. The Senate passage date also differs between sources: PBS and Al Jazeera say June 23, while our CRS fetch summary says May 19. We treat all of these as moving targets. — OB