President Trump issued a blunt warning to NATO allies on Sunday: help reopen the Strait of Hormuz, or face serious consequences for the future of the alliance.

In an interview with the Financial Times, Trump made clear that European nations and China, both far more dependent on Gulf oil than the United States, have no excuse for sitting on the sidelines while American forces do the heavy lifting.

"If there's no response or if it's a negative response I think it will be very bad for the future of NATO."

International oil prices have surged to roughly $106 a barrel, a staggering 45% increase since the Middle East conflict escalated, the New York Post reported. The Strait of Hormuz normally carries about a fifth of the world's oil supply. That makes this everyone's problem, not just America's.

The One-Way Street

Trump's frustration isn't new, but the stakes are. For decades, NATO has functioned as a security arrangement where American taxpayers fund the muscle and European capitals offer polite applause. Trump has called this out before. Now the receipts are coming due in real time.

Trump pointed directly to the Ukraine precedent. Thousands of miles from American shores, and the US showed up. He told the Financial Times:

"We have a thing called NATO. We've been very sweet. We didn't have to help them with Ukraine. Ukraine is thousands of miles away from us … But we helped them."

"Now we'll see if they help us. Because I've long said that we'll be there for them, but they won't be there for us. And I'm not sure that they'd be there."

That final line carries more weight than any diplomatic communiqué. The president of the United States isn't sure his allies will show up. And based on the evidence, why would he be?

Britain's Late Arrival

Trump singled out the United Kingdom specifically, noting he had spoken with Prime Minister Keir Starmer earlier on Sunday. The conversation apparently did not go well.

"The UK might be considered the number one ally, the longest-serving, etc., and when I asked for them to come, they didn't want to come."

Only after the US had "basically wiped out the danger capacity from Iran" did Britain offer to send two ships. Trump's response was cutting:

"We need these ships before we win, not after we win."

This is the "special relationship" in 2026. America fights. Britain waits for the all-clear, then sends a token gesture. The pattern speaks for itself.

Iran's Transparent Gambit

Iran announced Saturday that all countries except the US and Israel may pass through the strait. This is coalition-busting dressed up as diplomacy, an attempt to fracture the alliance by giving European capitals a reason to stay home. It came less than a day after the US bombed military targets on Iran's oil-critical Kharg Island.

The question is whether European leaders will take the bait. If they accept Iran's terms, they are effectively endorsing a regime that gets to dictate which nations can traverse international waters. That is not a precedent any serious country should tolerate.

China in the Crosshairs

Trump extended the pressure beyond NATO. He noted that China receives 90% of its oil through the strait, making Beijing one of the largest beneficiaries of American military operations in the Gulf. He even floated delaying his upcoming summit with President Xi Jinping until Beijing signals willingness to contribute. "We'd like to know before that. It's a long time … We may delay."

Linking the summit to concrete action on the strait is exactly the kind of leverage diplomacy that turns abstract alliances into tangible commitments. China has spent years free-riding on American security guarantees in the Gulf. That calculation just got more expensive.

The Military Picture

Trump described Iran's military capabilities as largely "decimated" after two weeks of fighting, arguing that European allies moving assets into the Gulf would face minimal risk. He called for NATO to provide minesweepers and forces capable of neutralizing threats along the Iranian shore.

He also signaled readiness to escalate further, noting the US struck "everything but the pipes" on Kharg Island, the loading site for most of Iran's oil exports. "We can hit that in five minutes. And there's not a thing they can do about it."

A French soldier was killed in an Iranian drone strike in Iraq on Thursday, a reminder that the conflict's costs are not falling on American shoulders alone, even if the burden remains grotesquely lopsided.

The Real Test

This moment strips NATO down to its essentials. The alliance was built on the premise of collective defense. For most of its history, "collective" has meant American power underwriting European security. Trump is now asking a simple question: Does the commitment run both ways?

Oil at $106 a barrel hurts European consumers far more than American ones. The US is a net energy producer. Europe is not. China is not. The nations with the most to lose from a closed Strait of Hormuz are the same nations dragging their feet on helping to open it.

If NATO cannot muster the will to protect a waterway that carries a fifth of the world's oil during an active conflict, then Trump is right to question what the alliance is for. Allies that only show up after the danger passes aren't allies. They're spectators.