WALL STREET JOURNAL: Trump Meets the Moment on Iran

President Trump’s decision to strike Iran’s three most significant nuclear sites on Saturday helped rid the world of a grave nuclear threat and was a large step toward restoring U.S. deterrence. It also creates an opportunity for a more peaceful Middle East, if the nations of the region will seize it.

"Iran’s key nuclear enrichment facilities have been completely and totally obliterated," Mr. Trump said Saturday night. He made clear Iran brought this on itself. "For 40 years, Iran has been saying ‘death to America,’ ‘death to Israel.’ They’ve been killing our people," he said, citing 1,000 Americans killed by Iran-supplied roadside bombs and other means. A nuclear Iran was a perilous threat to Israel, the nearby Arab states, and America.

TRUMP LAUNCHES PRECISION STRIKES AGAINST IRAN. TRIUMPH OR TRAP?

Mr. Trump gave Iran every chance to resolve this peacefully. The regime flouted his 60-day deadline to make a deal. Then Israel attacked, destroying much of the nuclear program and achieving air supremacy, and still the President gave Iran another chance to come to terms. The regime wouldn’t even abandon domestic uranium enrichment. Ayatollah Ali Khamenei wanted a bomb more than peace.

Military conflict is often unpredictable and the potential for Iranian retaliation can’t be dismissed, no matter how self-destructive it would be. Iran and its Iraqi proxies have threatened U.S. regional bases with missile fire, but Mr. Trump warned that "future attacks will be far greater" if Iran goes down that road. The U.S. has evacuated some personnel and brought military assets into the region. If the regime values self-preservation, it will give up its nuclear ambitions and stand down.

Much of the press has fixated on the idea that Mr. Trump has now joined or even started a conflict. But Iran has been waging regional and terrorist war for decades. It’s as likely that he has helped end it. Leaving Iran with a hardened nuclear enrichment facility after an Israeli military campaign would have been a recipe for maximum danger, all but asking Iran to sprint to a bomb.

At the same time, the Israeli campaign yielded a unrivaled strategic opportunity. Suddenly, Iran’s airspace was uncontested. Its substantial ballistic-missile program was degraded. Several of its proxies had been bludgeoned into silence. Its nuclear program had been reduced to a few key sites, one of which only U.S. weapons could be trusted to penetrate.

The opportunity to act and the danger of standing pat may have proved decisive. We would say that they left Mr. Trump little choice, except U.S. Presidents always have a choice, and have been known to kick the can down the road. To his credit, Mr. Trump didn’t, hitting the Fordow enrichment site as well as Natanz and Isfahan. This shows the President wanted to leave no doubt about Iran’s nuclear program and take it all down.

Good for him for meeting the moment, despite the doubts from part of his political base. The isolationists were wrong at every step leading up to Saturday, and now they are again predicting another Iraq, if not a road to World War III. Mr. Trump had to act to stop the threat in front of him to protect America, which is his first obligation as President.

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"History will record that President Trump acted to deny the world’s most dangerous regime the world’s most dangerous weapons," Israeli Prime Minister Benjamin Netanyahu said Saturday night. Mr. Trump thanked him and said "we worked as a team." The Israelis, who proved their strategic value as an ally, would like to complete the mission by destroying what remains of Iran’s missile infrastructure. They deserve a green light, especially as those missiles are threatening U.S. bases.

The chatter about TACO—"Trump always chickens out"—will now quiet down, but the more significant reassessment has to do with U.S. foreign policy. The Obamaites of the left, and lately of the right, counseled that the world had to bow to Iranian intimidation. The best we could hope for was a flimsy deal that bribed Iran with billions and left open its path to a bomb. They were wrong.