Five former U.S. defense secretaries are calling for Congress to investigate President Trump's recent firings of military leaders, including Gen. CQ Brown Jr. They expressed alarm over the moves, claiming they raise concerns about the politicization of the military and the removal of legal constraints on presidential power. The secretaries argued that there were no adequate justifications for the firings and labeled them as potentially partisan. They urged Senate members to halt new Pentagon confirmations until the administration provides explanations for these dismissals. The letter was signed by both Republicans and Democrats, highlighting bipartisan concern.