Defense Secretary Pete Hegseth is facing growing resistance from Republican senators as the U.S. continues its conflict with Iran and the administration seeks additional funding. Reports describe Hegseth’s push for tens of billions of dollars to rapidly inject resources into the war effort as having difficulty winning support, with lawmakers citing uncertainty about timing, strategy, and readiness to sustain the conflict. Several Republican senators say their confidence in Hegseth’s leadership of the U.S. armed forces is eroding as the war drags on without a clear end in sight. Thom Tillis, a frequent Trump administration critic, publicly tells The Hill that he no longer has confidence in Hegseth, arguing that leadership decisions have destabilized parts of the Department of Defense and that Hegseth lacks experience in large organizations. Other senators express concerns through anonymous remarks, including claims of diminished confidence within the Pentagon and suggestions that aspects of the strategy may not have fully accounted for developments such as Iran’s capacity to act. The reporting also notes broader concern about costs, including Hegseth’s prior request for major increases in Department of Defense funding.