Hearings to examine arms control and transforming international security functions at the State Department

Defense Posture and Global ThreatsSenate Foreign Relations · 2026-03-24 · 119th Congress
The Senate Foreign Relations Committee convened to hear from Undersecretary of State for Arms Control and International Security Michael DiNanno on the reorganized "T family" bureaus, the expiration of the New START treaty, and prospects for future arms control involving Russia and China. Begins at 0:23:48
Transcript
Highlights

Title

State Department arms control leadership on New START, China, and Iran

Purpose

The Senate Foreign Relations Committee convened to hear from Undersecretary of State for Arms Control and International Security Michael DiNanno on the reorganized "T family" bureaus, the expiration of the New START treaty, and prospects for future arms control involving Russia and China. Members also questioned DiNanno on Iran's nuclear program, arms sales to Saudi Arabia and Israel, export controls on AI chips to China, resumption of nuclear testing, and the UK-Mauritius Diego Garcia agreement. Begins at0:23:48

Who spoke

Chair Jim Risch (R-ID)0:23:48: Opened by framing arms control as urgent given Iran's nuclear ambitions and a "multipolar" landscape with Russia and China0:25:08; argued New START only constrained the US while Russia ignored it0:38:42; pressed DiNanno on whether China would negotiate once it reaches nuclear peer status0:39:12 and on rogue actors like Pakistan, where weapons are controlled by the military rather than the government0:43:32.

Sen. Jeanne Shaheen (D-NH), Ranking Member0:28:40: Criticized the administration's $16 billion emergency arms sale to the Middle East that bypassed congressional review0:28:40; said Gulf partners are burning through interceptors "in a day" what the US produces in a year and the US itself has only about a quarter of needed interceptors0:29:060:29:39; noted over 80% of Ukrainian strikes are now carried out by drones0:30:05; pressed on whether the US is proactively engaging Russia on arms control given China's refusal0:45:14.

Mr. Michael DiNanno, Undersecretary of State for Arms Control and International Security0:32:54: Described the July 2025 reorganization expanding the T family from three to five bureaus0:33:18; said New START's 1,500 Russian strategic systems combined with roughly 1,000 additional warheads already approach 2,500, near symmetry with the planned US level0:40:09; said the Counterterrorism Bureau has designated nearly 30 foreign terrorist organizations, including 15 narco-terrorist cartels, since January0:37:11; on Saudi Arabia, confirmed the civil nuclear agreement is unsigned and declined to detail nonproliferation terms until signed1:10:561:13:01; said any deployment of a Russian antisatellite nuclear system would violate the outer space treaty0:55:28; called Diego Garcia's preservation as a forward operating base a top administration priority and said there is "no daylight" between the State Department and the President on the issue1:37:061:39:55.

Sen. David McCormick (R-PA)0:51:59: Asked how NATO allies' threat assessments on Iran's missile capability are being updated after a missile launch reaching Diego Garcia0:52:23; noted US nonproliferation regimes date to 1974–1987 and need modernizing0:53:30; raised Russia's development of antisatellite nuclear weapons per the DNI0:54:52.

Sen. Tim Kaine (D-VA)0:57:00: Asked what the "T family" designation means0:57:00; questioned DiNanno on progress developing the AUKUS partnership and regulatory reform needed to enable it, including the excluded technologies list0:57:321:01:03.

Sen. John Cornyn (R-TX)1:02:49: Asked about the necessity of a reported ~$400 billion emergency supplemental to replenish munitions used in the Iran conflict1:03:20; asked what it would take to bring China into arms control talks1:06:18; asked about the location and status of Iran's enriched uranium stockpile, later withdrawing the location-specific part of the question1:08:191:08:59.

Sen. Jeff Merkley (D-OR)1:10:23: Pressed on whether the Saudi Arabia civil nuclear agreement will include the "gold standard" additional protocol, no-enrichment, and no-reprocessing terms1:11:491:12:18; warned that weaker Saudi standards would set a bad precedent given Iran-Saudi regional rivalry1:13:14.

Sen. Chris Van Hollen (D-MD)1:15:31: Referenced DNI Tulsi Gabbard's testimony that Iran's enrichment program was "obliterated" by Operation Midnight Hammer and asked if DiNanno agreed1:16:26; repeatedly pressed on whether DiNanno personally reviewed the emergency transfer of over 20,000 bombs to the Netanyahu government for compliance with the Conventional Arms Transfer policy1:19:381:21:28; asked DiNanno to review reported comments by Israeli Defense Minister Katz about a "Rafah model" in Gaza1:22:23.

Sen. Pete Ricketts (R-NE)1:22:42: Raised concerns about licensed AI chip (H200) sales to China given China's civil-military fusion strategy and a $2.5 billion chip-smuggling case1:23:08; announced plans to introduce the Multilateral Alignment of Controls Act to harmonize export controls with allies1:28:35.

Sen. Jacky Rosen (D-NV)1:29:23: Described the Nevada National Security Site's history of 100 atmospheric and 828 underground nuclear tests from 1951-19921:29:23; pressed DiNanno on the administration's position on resuming explosive nuclear testing and its implications for Nevada and multilateral arms control1:30:26.

Sen. Ted Cruz (R-TX)1:35:17: Challenged DiNanno over reports that the State Department's Political-Military Affairs Bureau supported a UK-Mauritius deal transferring the Chagos Archipelago, contrary to President Trump's public opposition1:35:491:39:00; cited Trump's February 18 social media post opposing any lease deal over Diego Garcia1:38:01.

Key moments

Shaheen said the administration used emergency authority to push through more than $16 billion in Middle East arms sales, bypassing normal congressional review0:28:40, and that Gulf partners are burning interceptors at a rate the US produces in a year in a single day0:29:06.

Risch directly disputed DiNanno's characterization that New START "did not restrain any country," saying it restrained only the US while Russia ignored its terms0:38:42.

DiNanno said Russia's roughly 2,500 combined strategic systems and warheads are already approaching the parity the US would hold at 1,500 under New START levels0:40:09.

Shaheen noted "unheard of bureaucratic speed" claimed by DiNanno on a new interagency executive council was met with skepticism — "that does not make me feel better," she said, with Risch adding "not a very high bar"0:49:460:49:500:49:53.

Merkley pressed on whether the pending Saudi Arabia civil nuclear agreement will include additional protocol inspections, and no-enrichment/no-reprocessing terms; DiNanno declined to confirm any of the three "gold standard" elements before the agreement is signed1:12:181:13:01.

Van Hollen and DiNanno sparred repeatedly over whether DiNanno personally reviewed the compliance of a 20,000-bomb emergency transfer to the Netanyahu government with the administration's own Conventional Arms Transfer policy; DiNanno repeatedly did not give a direct yes/no answer1:19:381:21:36.

Van Hollen cited President Trump's March 4 statement that Iran would have a nuclear weapon within two weeks absent strikes, calling it "manifestly untrue" based on intelligence testimony1:18:39.

Rosen sharply challenged DiNanno on reports that the administration is considering resuming nuclear testing, warning of groundwater contamination risk to Nevada, Utah, and neighboring states, and said "I tend to disagree with you" after DiNanno said no atmospheric testing was under discussion1:30:261:35:09.

Cruz confronted DiNanno with a State Department statement saying "the U.S. supports" the UK-Mauritius Chagos Archipelago deal, which he argued directly contradicted President Trump's public "Do not give away Diego Garcia!" statement, and demanded to know who authorized it1:38:271:39:36.

Ricketts announced he plans to introduce the Multilateral Alignment of Controls Act to harmonize semiconductor manufacturing equipment export controls with allies against China1:28:35.

Metadata

CommitteeSenate Foreign Relations
Chamber / CongressSenate · 119th Congress
Date2026-03-24
TypeMeeting
Witnesses
(none listed in event metadata)
Videosenate-isvp
Transcript253 caption blocks · 10,373 words · 1:41:41 runtime
EventCongress.gov 338081