Forty-six U.S. senators signed the Cantwell letter on March 11, 2026, explicitly flagging the administration’s non-compliance with the War Powers Resolution’s 60-day clock, which had expired in November 2025. The letter represented the most substantial congressional challenge to the legal basis of Operation Southern Spear and preceded narrowly failed resolutions of disapproval in both 2025 and 2026.
46 Senators Send War Powers Compliance Letter