Forty-six Democratic senators, led by Sen. Elissa Slotkin of Michigan, are pressing Secretary of Defense Pete Hegseth to provide Congress with a detailed accounting of the Iran war’s cost, future funding requests and the planned disbursement of unspent money from last year by Sept. 30. The letter follows a report that Pentagon officials told congressional staff in August that the war’s estimated cost had reached $42 billion. Lawmakers also cited the Pentagon’s $67 billion supplemental request in June and its $1.5 trillion total funding request for the next fiscal year. The new estimate adds to conflicting figures: the Pentagon inspector general estimated $33 billion through June 30, the Congressional Budget Office put the cost at $38 billion, and Hegseth said in July that it was $37.5 billion. Sen. John Fetterman of Pennsylvania was the only Democratic senator not to sign, maintaining his support for confronting Iran and its proxies. The dispute comes as negotiations over next year’s government funding are deadlocked, with Republicans seeking full defense funding and Democrats pushing for a lower defense total to preserve money for domestic programs.