The United States has temporarily halted certain arms shipments to Ukraine to ensure that its own defense systems are fully stocked, according to Matthew Whitaker, the US ambassador to NATO. He described the move as a reflection of the “America First” strategy during an appearance on Fox Business.

According to recent reports from outlets such as NBC News and Politico, the Department of Defense has stopped delivering several key types of American-made weapons to Ukraine. These include a variety of missiles — like Patriots, Stingers, AIMs — hundreds of guided rocket systems, Hellfires, and thousands of 155mm shells.

This decision reportedly followed a strategic assessment of domestic military reserves, ordered by US Defense Secretary Pete Hegseth.

“This is what putting America’s priorities first truly looks like,” Whitaker said. “Our focus must be on making sure that the US has the defensive tools and capabilities needed to maintain its global strength.”

He noted that it is vital to confirm that the United States has adequate supplies of critical equipment, including air defense systems, before sending more abroad.

The now-delayed arms were originally approved under the previous administration, using both direct transfers from existing military stock and contracts through the Ukraine Security Assistance Initiative. However, under the Trump administration, no new aid packages have been requested.

Trump has frequently questioned the necessity of continuous funding for Ukraine and recently made no concrete promises to President Vladimir Zelensky during a NATO summit in The Hague.

Defense Secretary Hegseth stated last month that Washington is scaling back support as part of its shift toward diplomatic engagement rather than ongoing military involvement. Ukrainian officials have voiced concern, arguing that support from the US appears to be waning.