US Senate rejects resolution to limit Trump’s war powers on Iran

The US Senate voted 51-46 against a resolution to limit President Trump’s war powers in Iran, leaving the market on no qualifying diplomatic US-Iran meeting by June 30 at 8% YES, up from 2% a week ago.

Market reaction

The vote removed a potential constraint on military action, and traders responded accordingly. The market for Trump agreeing to Iranian oil sanction relief in April dropped to 18% YES, down from 36% a week ago. The no diplomatic meeting by June 30 market jumped to 8% from 3% just 24 hours ago. With 68 days left, both markets are moving toward expectations of continued confrontation rather than negotiation.

Why it matters

The 51-46 vote gives the administration a free hand on military operations against Iran with no congressional check in place. That makes any near-term diplomatic opening less likely, which is exactly what the odds reflect: sanction relief agreement down by half in a week, diplomatic meeting probability still in single digits.

What to watch

The diplomatic meeting market had combined 24-hour volume of $5,912 in USDC. The order book is thin, with just $268 needed to shift the market by 5 points, making it vulnerable to large trades. The biggest price move was a 3-point drop at 10:53 PM, suggesting a single significant sell order.

Watch for statements from Defense Secretary Pete Hegseth or Vice President J.D. Vance. Any shift in rhetoric on military strategy or diplomatic openings could move these markets quickly given the low liquidity. At 18¢, buying YES on Trump agreeing to Iranian demands pays $1 if it resolves, a 5.5x return, but the Senate vote makes that outcome harder to reach without a major change in direction.

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