How many times has President Trump said that the war in Iran, now entering its fourth week, will be brief? Many. I asked Grok for 20 examples of Trump promising a short war, and got a list very quickly. Here are a few:

“This war will be over very soon.”

“I think you’ll see it’s going to be a short-term excursion.”

“We’re getting very close to finishing … it is going to be ended soon.”

“We’re way ahead of schedule … it won’t be much longer.”

“We projected four to five weeks … but we’re substantially ahead of schedule.”

“It’s going to be ended soon … we’re getting very close.”

No president wants to promise the public years of war. But why has Trump pledged brevity so early and so often, beginning almost the moment the war began? After all, polls from the first U.S.-Israeli attack on Iran showed that, while there was significant public opposition to the war, support among Trump’s supporters was high. It has stayed that way.

The fear, of course, was that voters would take Trump’s campaign vow not to take the nation to war — "I’m not going to start a war, I’m going to stop wars,“ he promised on the night of his comeback win in November 2024 — and apply it to the situation in Iran. But so far at least, Trump’s supporters have stuck with him on the new war.

Of course, campaign Trump vowed even more often to stay out of what he called endless wars. But endless clearly means endless, or at least protracted, conflicts. Trump obviously feels he can use the military for quick strikes, like the June 2025 bombing of Iran’s nuclear facilities or the January 2026 operation in Venezuela. They were brief and effective uses of U.S. military power, and are in no sense endless engagements.

The political problem for Trump is that at some point, a brief and effective use of U.S. military power becomes something more than that. Yes, a conflict would have to go on for a long time before it qualifies as endless. But at the moment, Trump is deeply worried about the war’s economic effects; a war does not have to be endless to do a lot of damage to the U.S. and world economies.

In addition, Trump has to worry about that point at which the Iran war takes its place as a major, large-scale war — not a quick hit but Gulf War III, after wars in the region pursued by President Georger H.W. Bush in 1991 and President George W. Bush in 2003. Trump surely would not like to be in those presidents’ company as a Persian Gulf warrior.

Neither would Vice President JD Vance, a vehement critic of Iraq-style wars and Trump’s possible 2028 successor. At a midterm campaign appearance in Michigan last week, Vance quoted Trump to stress that the war-related energy price increases will be a "temporary blip.” And Vance added: “Nobody likes war, right? And I guarantee you the president of the United States is not interested in getting us in the kind of long-term quagmires that we’ve seen in years past.”

There is concern in those words. This war, even now, will have consequences. After joining Israel in such a broad-based attack, U.S. forces cannot just disappear. For example, a new op-ed in the Wall Street Journal by two veteran foreign policy analysts notes, “If Trump wins this war politically and militarily, victory will entail new burdens. The security of the Persian Gulf will be America’s responsibility … American destroyers circulating permanently in the Gulf is a likely future.”

That’s not the kind of thing the Trump political base will be delighted to hear, even if they approve of the war’s first days. The needle Trump needs to thread is to minimize those “new burdens” so that he can say to his supporters that U.S. forces got in quickly, fixed the problem, and got out quickly. Whether that is plausible or not is another question.

Until then, Trump continues to promise a quick war. How many defenders of the war have answered critics by saying, “Hold on, it’s only been a week,” or two weeks, or three weeks? Indeed, it hasn’t been long. But it’s been long enough for the White House to be worried.

This content originally appeared on the Washington Examiner at washingtonexaminer.com/daily-memo/4500754/trump-needs-short-war-iran/.