President Donald Trump’s options for a war with Iran may be limited by a diminished arsenal.

“Joint Chiefs Chair Dan Caine expressed concerns to Trump at the White House last Tuesday that any major operation against Iran will face challenges because the US munitions stockpile has been significantly depleted by US’s ongoing defense of Israel and support for Ukraine,” the Washington Post’s John Hudson wrote on X Monday.

NEW: Joint Chiefs Chair Dan Caine expressed concerns to Trump at the WH last Tues that any major operation against Iran will face challenges because the US munitions stockpile has been significantly depleted by US’s ongoing defense of Israel & support for Ukraine.

— John Hudson (@John_Hudson) February 23, 2026

Following the Russian invasion of Ukraine and Hamas attack on southern Israel, Washington has sent a massive amount of military assistance to Kiev and Tel Aviv. After the war with Iran in June, US officials reported that a significant portion of America’s stockpile of interceptors had been depleted defending Israel.

According to Hudson, Crain has raised other issues with Trump about attacking Iran. “In Pentagon meetings this month, Caine also has raised concerns about the scale of any Iran campaign, its inherent complexity and the possibility of US casualties,” he wrote. “The general has said that any operation would be made all the more difficult by a lack of allied support for a US attack on Iran.”

Iran has threatened to respond to any attack by striking American military bases in the Middle East and Israel.

While Crain has raised concerns about logistics and US casualties, a source told Hudson that he will comply with what Trump orders. Craine “will support whatever decision the president makes, as he did with previous operations, and does not want to be seen as taking any option off the table,” the Washington Post reporter wrote on X.