Citing legal requirement, senator wants a designated inspector general to provide oversight of Iran war

Updated at 3:58 p.m. ET May 28 

A Democratic senator on Thursday requested that an inspector general oversight body designate one of the agency watchdogs to spearhead reviews of the ongoing war in Iran, citing a requirement in federal statute. 

In her letter, Sen. Tammy Duckworth, D-Ill., pointed to a provision in the U.S. Code mandating that the chair of the Council of Inspectors General on Integrity and Efficiency tap an IG to head oversight of a military “overseas contingency operation that exceeds 60 days.” 

The U.S. and Israel launched airstrikes against Iran on Feb. 28. 

“IG quarterly reporting, audits, inspections and investigations related to OCOs have promoted valuable transparency and accountability across presidential administrations and enable federal agencies to be better stewards of taxpayer dollars,” Duckworth wrote. “The need for you to appoint a lead IG to advance these aims and conduct joint, comprehensive and independent oversight of contingency operations against Iran has never been greater, as the Trump administration’s explanations of the president’s purported mission, lines of effort and desired end states with respect to Iran are constantly shifting, and often contradict themselves.”

Defense Department officials have testified that the war has cost an estimated $29 billion. 

The CIGIE chair is limited to selecting the IG for the Defense Department, State Department or U.S. Agency for International Development. While the Trump administration folded USAID into State in 2025, the USAID IG office is still active. 

The designated IG would be responsible for developing a strategy for oversight of the military operation, reviewing the accuracy of associated spending information provided by federal agencies and resolving any jurisdictional crossovers. They also would be required to issue regular public reports on their activities. 

In her letter, Duckworth argued that the war in Iran meets the definition of an OCO because Operation Epic Fury is identified as one in the DOD’s casualty database and because members of the National Guard have been deployed to the region. Under federal statute, if a military action includes ordering a member of the National Guard to active duty, that qualifies it as a “contingency operation.” 

Duckworth requested that CIGIE Chair Cheryl Mason provide her selection for the IG by June 5. Mason also is the IG for the Veterans Affairs Department. 

Andrew Cannarsa, CIGIE's executive director, said in a statement to Government Executive that the council has "received the letter from Senator Duckworth and is working to address the senator’s inquiry."

The senator has criticized Mason’s confirmation as VA IG and election to CIGIE chair because she previously served as a senior adviser to VA Secretary Doug Collins. As such, Duckworth and good government groups have contended that Mason cannot provide independent oversight.

This story has been updated with a statement from CIGIE.