A House Democrat got into a tense exchange with the Army’s top general on Wednesday, saying he won’t approve any more funding for war operations before finding out how the administration plans to defeat the Islamic State.

Army chief Gen. Mark Milley had just warned the House Armed Services Committee that if Congress punts on a new defense budget at the end of this month, it will result in American deaths on the battlefield. The top officers from the other services also outlined severe effects such as grounding aircraft and halting training.