Border Security is National Security Act

S 301, the "Border Security is National Security Act," authorizes $10 billion in additional funding for the Department of Defense (DoD) to support border security operations led by the Department of Homeland Security (DHS). The bill directs DoD to use these funds for specific border security measures, including surveillance systems, barriers, patrol roads, military aviation, and counter-drone systems. It explicitly states Congress believes the President has constitutional authority to deploy military forces for border security under existing laws and appropriations. The funding remains available until September 30, 2028, with requirements for congressional notification of fund transfers.