US media extensively covered Health and Human Services Secretary Robert F. Kennedy Jr.'s combative Senate hearing, where lawmakers from both parties rigorously questioned him on CDC turmoil, vaccine policies, and his performance, with calls for his resignation intensifying throughout the day. Concurrently, President Trump's administration continued its legal battle over tariffs, escalating the case to the Supreme Court. Later in the day, a prominent new development emerged as President Trump directed the renaming of the Department of Defense to the "Department of War," signaling a shift in federal posture. Further administrative actions included the Department of Justice suing Boston over "sanctuary city" policies and continued efforts by Republicans to change Senate rules to speed Trump's nominees. Washington D.C. also challenged the administration with a lawsuit over the National Guard's deployment.