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What Just Happened
On May 19, 2026, the Senate advanced a war powers resolution to halt military action in Iran by a 50-47 vote. Four Republicans defected: Sen. Bill Cassidy of Louisiana broke with his party for the first time on war powers. Sen. Tim Kaine of Virginia is the lead sponsor.
The House had a companion resolution scheduled. GOP leadership pulled it when whip counts showed they did not have the votes to defeat it. The vote has been delayed into June.
This is the closest Congress has come to restraining unilateral military action since the conflict began.
Cuba and Greenland Are Part of the Same Pattern
| Front | What happened | Congressional response |
|---|---|---|
| Iran | Active military operations | Senate advanced war powers resolution 50-47; House vote pulled |
| Cuba | U.S. claims Cuba bought 300 drones from Russia and Iran | Senate Republicans blocked Kaine’s war powers resolution |
| Greenland | Trump imposed tariffs to pressure Denmark into a sale | Murkowski and Shaheen introduced a separate war powers resolution |
Three fronts. One question: does Congress authorize military action, or does the president act alone? This is part of a broader fight over war powers and foreign policy that reaches beyond any single theater.
What You Can Do
- Send the Iran war powers letter on Resistbot asking Congress to enforce its constitutional authority over military action.
- Call your House representative today. Ask whether they will force a vote on the Iran war powers resolution that leadership pulled. The delay into June means the window is still open.
- If your senator is Bill Cassidy, Susan Collins, Lisa Murkowski, or Rand Paul, call and thank them. Bipartisan defections only hold if constituents reinforce them.