The European Central Bank held its benchmark rate at 2.25% on July 23, pausing after a quarter-point increase in June amid volatile oil prices from the US-Iran conflict and the disruption of shipments through the Strait of Hormuz.^1 That is the headline from Frankfurt. The story underneath is that the same war that has European central bankers pausing is a war the United States is fighting without an appropriated budget, without a Congressional Budget Office score, and without a Federal Reserve policy posture that names the fiscal-monetary feedback loop the oil shock has opened.
When the ECB raised rates on June 11, it cited the same oil-supply disruption that has now forced a pause—an admission that a US military operation’s energy consequences had spilled into eurozone consumer prices. The ceasefire collapsed; oil prices bounced; the ECB has nowhere to go until the trajectory stabilizes. The Bank of England faced the same uncertainty last month, holding rates steady and signaling caution on the Hormuz reopening timeline.
The causal chain runs through US fiscal and monetary policy.
Start with the defense budget. The Department of Defense is funding the conflict through reprogramming authority under 10 U.S.C. § 2214—the mechanism that lets the Pentagon move money between accounts without a new appropriation. Congress has not passed a supplemental. CBO has not scored the war’s impact on fiscal-year 2026 deficits; its January 2026 Budget and Economic Outlook projects federal debt held by the public continuing to rise as a share of GDP over the ten-year window on current law.^2 Every week of unappropriated operations adds to a trajectory the projection already labels unsustainable. The Office of Management and Budget’s mid-session review—the formal update to the President’s Budget, typically released in July—has not appeared. When the administration fighting a war declines to publish its own updated fiscal estimate, the reader should note the gap.
Follow the barrel to the Federal Reserve. The FOMC’s June meeting minutes document a committee wrestling with the same energy-price uncertainty that gave the ECB pause.^3 The Fed had been signaling, through its December 2025 post-meeting statement, a gradual path toward lower policy rates as inflation moderated. The Hormuz disruption and oil-price pass-through into headline CPI complicated that path. If the Fed must hold the federal funds rate higher for longer—or tighten again—the fiscal consequences compound: CBO projects net interest costs on federal debt will exceed defense spending within the current budget window, and each quarter of elevated rates accelerates that crossover.
The feedback loop is structural. A US military operation raises oil prices. Higher oil prices raise US and European inflation. Higher inflation forces the Fed to hold rates elevated. Higher rates raise the federal government’s borrowing cost on a debt stock that the Treasury Department’s Daily Statement shows above $36 trillion.^4 The interest-expense line is the fastest-growing category in the federal budget, and it moves with the Fed’s policy rate. The cycle is self-reinforcing, and no one in the current budget process is scoring it.
Then the tariff layer. The administration’s secondary sanctions on Iranian oil buyers and the unresolved tariff framework with the European Union operate as additional cost layers on the same energy-price chain. Each tariff escalation that raises import prices adds to the inflationary pressure the Fed must weigh. Each unresolved trade negotiation with the EU—whose energy prices are themselves distorted by the Hormuz disruption—compounds the uncertainty the ECB cited as its reason for pausing. These are fiscal and regulatory choices Washington controls; European central bankers react to the consequences.
The ECB’s rate hold is a canary. The cage is a US fiscal system simultaneously fighting an unfinanced war, managing the interest costs of $36 trillion in accumulated debt, and absorbing the energy-price consequences of its own trade actions—while the budget office charged with scoring the damage has not produced an update. The September 10 ECB meeting will come and go. The structural distortion will remain.
^1 Associated Press, “European Central Bank leaves interest rates unchanged with energy prices increasingly volatile,” July 23, 2026.
^2 Congressional Budget Office, The Budget and Economic Outlook: 2026 to 2036 (January 2026).
^3 Federal Reserve, FOMC Minutes, June 2026 meeting.
^4 U.S. Treasury Department, Daily Treasury Statement (July 2026).