Thirteen U.S. service members have been killed in the 2026 Iran war. The Pentagon's briefing to Congress stated $11.3 billion for the first 6 days, plus $1 billion per day ongoing , though independent analyses estimate the war is costing about $2 billion per day in short-term costs . Warren is using Pentagon figures, but independent cost trackers suggest actual operational spending is significantly higher—making her fiscal argument more compelling than the conservative $1B baseline she cites.