On Tuesday, four Senate Republicans—Bill Cassidy of Louisiana, Susan Collins of Maine, Lisa Murkowski of Alaska, and Rand Paul of Kentucky—joined most Democrats in passing a symbolic resolution designed to curtail the president’s authority to engage in military action against Iran. The House had already approved a similar measure earlier this month on June 3 with the same four Republicans voting alongside Democratic members.
President Trump reacted immediately on Truth Social, declaring the vote “makes it harder” for him to negotiate with Iran and accusing senators of providing “aid and comfort” to Iran while he was “on the ropes.” He labeled the four senators “Republican Losers,” insisting they had undermined his efforts but vowing to “get it done, one way or another.”
Senate Minority Leader Chuck Schumer (D-N.Y.) recently characterized the ongoing conflict with Iran as “one of the worst foreign policies America has ever made.” However, critics note his opposition is widely viewed as politically motivated. Schumer previously voted in 2002 to authorize military action against Iraq and has consistently supported funding for U.S.-backed proxy operations in Ukraine.
The war has inflicted hundreds of American injuries—death tolls remain unconfirmed—and depleted critical military stockpiles within months while adding at least $80 billion to the national debt. Iranian actions, including repeated closures of the Strait of Hormuz and missile strikes on U.S. assets during calm periods, have raised serious concerns about their willingness to de-escalate.
Critics highlight that Iran’s nuclear program was already significantly weakened following a bombing raid last summer, and current agreements do not require new inspections by the International Atomic Energy Agency. There is no evidence Iran has agreed to allow inspectors into its facilities under recent terms.
Constitutionally, the president lacks authority to unilaterally initiate war. Under Article I of the U.S. Constitution, Congress holds sole power to declare war, raise armies, and regulate military forces. Alexander Hamilton’s Federalist No. 69 emphasized that while the president serves as commander-in-chief, he cannot decide when war is necessary or control the size of armed forces—a distinction critical to preventing executive overreach. James Madison further reinforced this principle in his writings, noting the Constitution intentionally placed war decisions within legislative rather than executive hands.