Don Wolfensberger at The Hill:
In the Iran case last month, Sen. Tim Kaine (D-Va.) and Reps. Thomas Massie (R-Ky.) and Ro Khanna (D-Calif.) introduced concurrent resolutions in their respective chambers prohibiting the president from going to war with Iran. Kaine switched to a joint resolution at the last minute using a process under the International Security Assistance and Arms Export Control Act to bar military action.
On June 27, the Senate voted 47-53 to reject Kaine’s motion to discharge the bill from the Foreign Relations Committee. In the House, Massie said he would not call-up his concurrent resolution to bar war with Iran so long as the cease fire with Israel held.
Trump, while not seeking a formal authorization for the use of military force against Iran, either before or after the bombing, did send letters to the House and Senate leaders on June 23 explaining the reasons for his actions, in compliance with the War Powers Resolution’s requirement “to keep Congress fully informed.”
Nevertheless, as some have pointed out, every action by a president without Congress’s involvement is a unique case and thereby sets a new precedent and justification for future unilateral presidential military actions. Every new situation in which Congress refrains from asserting its war power role simply puts a new arrow in the president’s quiver.