The U.S. Senate advanced a procedural measure on May 19 that could force President Donald Trump to seek congressional approval for military operations against Iran, a move some analysts interpret as a potential de-escalation signal that may benefit risk assets like cryptocurrencies. The vote passed 50–47, with four Republicans joining most Democrats, but the resolution still faces significant legislative and veto hurdles.
Senator Tim Kaine, who sponsored the bill under the War Powers Act of 1973, said Congress should decide whether the U.S. remains in the conflict, calling the 80-day-old campaign an "illegal war" and stressing that "Congress has the power to slam the brakes on this unwise conflict." Republican Senator Bill Cassidy, who supported the measure, argued the White House and Pentagon had left Congress "in the dark" on Operation Epic Fury.
Bitcoin (BTC) showed little immediate reaction, trading near $77,200 at the time of reporting, while Ethereum (ETH) and XRP posted modest intraday losses of 1–3%. However, market observers see de-escalation headlines as historically positive for crypto. Bitrue Research Institute's Andri Fauzan Adziima said the vote could be "a strong bullish catalyst for crypto," projecting a potential 6% to 10% relief rally in Bitcoin. HashKey Group senior researcher Tim Sun called the vote a "relatively mild positive catalyst" for risk assets.
Past episodes support this pattern: Bitcoin surged to near $79,500 in April after reports of a new Iran proposal before pulling back, and ETF inflows reached $597.5 million over two days during renewed ceasefire hopes. Reduced geopolitical stress could also revive activity on Ethereum's DeFi ecosystem and boost XRP's role in cross-border payments by easing compliance and banking uncertainties. Still, the resolution faces a difficult path—it must pass the full Senate, the Republican-led House, and a potential Trump veto requiring a two-thirds majority override in both chambers, leaving its ultimate market impact uncertain.
