Political divisions surface over America's defense stockpiles as military operations against Iran enter their second week. Democratic lawmakers express concern about depleted weapons inventories while the Trump administration maintains adequate supplies exist.
WASHINGTON — Military operations against Iran have sparked a political debate over America’s defense inventory levels, highlighting manufacturing challenges that defense experts warn could impact future conflicts.
Trump administration officials maintain that U.S. forces possess adequate weaponry for the ongoing Iran conflict, which has entered its second week. On Friday, President Donald Trump announced via social media that multiple defense companies committed to increasing weapons manufacturing by four times “as rapidly as possible,” though specific weapon systems weren’t identified.
Democratic legislators have intensified scrutiny of national weapons reserves as military operations against Iran expand, with many calling Trump’s actions a “war of choice.” Defense analysts indicate missile defense systems face the greatest pressure, particularly Patriot and Terminal High Altitude Area Defense (THAAD) interceptors currently deployed in Ukraine and Israel.
“I’m not particularly worried about us actually running out during this conflict,” stated Ryan Brobst, a defense strategy researcher at the Foundation for Defense of Democracies. “It’s about deterring China and Russia the day after this conflict is over.”
American forces deploy both defensive systems to counter Iranian missile attacks launched in response to U.S. and Israeli strikes. However, Pentagon officials acknowledge difficulties stopping drone swarms from the Islamic Republic, prompting deployment of an American anti-drone technology successful against Russian drones in Ukraine. The Merops system offers cost advantages, firing at drones costing under $50,000 rather than using missiles worth hundreds of thousands of dollars.
Pentagon chief spokesman Sean Parnell stated that the U.S. military “has everything it needs to execute any mission at the time and place of the President’s choosing and on any timeline.”
Defense contractor Lockheed Martin announced Friday on X that it agreed to “quadruple critical munitions production” and “began this work months ago.” Neither Trump nor Lockheed provided timelines for achieving production targets.
Democratic lawmakers question the long-term consequences for America and its allies.
“We’ve been told again and again and again one reason that we can’t provide interceptors for the Patriot system or other munitions for Ukraine is that they’re in short supply,” Senator Richard Blumenthal, D-Conn., told CNN Thursday.
Senator Mark Warner, D-Va., informed reporters that American supplies have decreased following military engagements with Houthi rebels in Yemen and recent Republican administration conflicts. The Senate Intelligence Committee’s top Democrat didn’t specify which munition types he referenced.
“Our munitions are low. That’s public knowledge,” Warner stated. “It will require additional funding, funding where we have other domestic needs as well.”
Defense interceptor supplies face the greatest strain, according to Brobst, who serves as deputy director of the Center on Military and Political Power at the Foundation for Defense of Democracies, a Washington-based hawkish think tank.
THAAD systems target medium-range ballistic missiles, while Patriot systems counter short-range ballistic missiles and piloted aircraft. Approximately 25% of America’s entire THAAD inventory was reportedly used protecting Israel from Iranian ballistic missiles during last summer’s 12-day conflict with Iran, Brobst noted.
“These were already in very high demand and we had not procured enough before the conflict,” Brobst explained. “And now we’ve probably used, between the two of them, probably several hundred more.”
Exact quantities of U.S. THAAD and Patriot systems remain classified, with administration officials and Democratic lawmakers refusing to provide specifics.
Interceptor demand likely decreases as the U.S. and allies eliminate Iran’s weapons capabilities, Brobst observed. General Dan Caine, Joint Chiefs of Staff chairman, reported this week that Iranian ballistic missile launches dropped 86% from the conflict’s opening day.
Additional sought-after munitions include cruise missiles and precision-guided missiles, called “standoff” weapons, Brobst said. Their stockpiles appear healthier, with usage probably peaking early in the war as U.S. forces targeted Iran’s early-warning systems, air defenses and other installations.
Defense Secretary Pete Hegseth confirmed that American forces used more “standoff munitions at the start, but no longer need to.” He told reporters Wednesday they would employ “500-pound, 1,000-pound and 2,000-pound GPS- and laser-guided, precision gravity bombs.”
America maintains adequate supplies of these weapon types, which cost less but require aircraft to approach targets more closely, Brobst said.
The U.S. military plans to strengthen regional anti-drone capabilities with the Merops system that uses drones against drones. Small enough for a midsize pickup truck, it identifies drones and pursues them, utilizing artificial intelligence for navigation when satellite and electronic communications face jamming.
Brobst noted the advanced munitions shortage problem, especially interceptors, existed long before the Iran war, though “this has definitely not made it get any better by using up these munitions.”
“Successive administrations over multiple decades did not procure sufficient quantities of these interceptors, and when that happens, companies don’t have an incentive to expand their production capacity,” Brobst explained, adding that production increases require “significant time.”
The administration recently promised increased defense spending and accelerated production while directing the Pentagon to identify underperforming defense contractors with insufficient manufacturing investment.
Katherine Thompson, a former deputy senior adviser at the Pentagon during the current Trump administration, said former President Joe Biden reduced interceptor stockpiles by sending them to Ukraine.
“It was a short-term win for the Biden administration but a long-term strategic problem for the United States as a whole,” said Thompson, who departed her Pentagon role in October and now serves as a senior fellow in defense and foreign policy studies at the libertarian Cato Institute. “I would hope that the Trump administration doesn’t make that same mistake here.”
Riki Ellison, chairman of the Missile Defense Advocacy Alliance, said the U.S. military could relocate interceptors globally or obtain them from allies if necessary. He also highlighted Pentagon efforts encouraging defense contractors to increase production.
“We’re moving in that direction,” Ellison said. “That’s not going to be ready next week or anything, but it’s moving.”