On 23 July the House passed a resolution telling President Trump to end hostilities with Iran. The vote was 214 to 208. Four Republicans joined every Democrat. They were Tom Barrett of Michigan, Warren Davidson of Ohio, Thomas Massie of Kentucky, and Brian Fitzpatrick of Pennsylvania. Those same four crossed on 3 June. A similar measure passed that day, 215 to 208.

The Senate went the other way that same day. A binding resolution from Senator Chris Van Hollen fell 47 to 49 on a motion to pull it out of committee. Susan Collins was the lone Republican voting yes. John Fetterman was the lone Democrat voting no.

Neither result changes anything on the ground. The House measure is nonbinding. The Senate never got its version to the floor. And a veto waits at the end of any path that did work. This was the fifth time the House has voted on the war and only the second time a measure passed.

Then members left for a five-week recess. They will spend August in their districts, and the war is now 145 days old.

Eighteen American service members have died since fighting started in February. Four of them died after 17 July. Three of those four were killed in an Iranian attack on a base in Jordan. The last died in Iraq during what was meant to be a controlled detonation of an unexploded Iranian drone. The Pentagon also counts close to 500 injuries, with about 100 in the past two weeks.

Behind the jump sits a collapsed deal. Last month the administration announced a memorandum of understanding with Iran, and the shooting slowed while talks continued. Trump then declared that document over. On 10 July he formally told Congress the fighting had resumed.

On 22 July the president attended a dignified transfer at Dover Air Force Base for four service members killed in the Middle East. That happened the day before the House vote, and members knew it.

Representative Jason Crow, an Army veteran who served in Iraq and Afghanistan, built his statement around the death toll rather than the constitutional argument. That choice is worth noticing, because it is the argument most likely to travel outside Washington.

Opposition to the war is not new. What changed this month is where the opposition is coming from.

A Politico poll released on 22 July found that 37 percent of Trump’s own supporters back the war if it drives prices up. In May the same question got 50 percent. That is a thirteen-point drop inside the coalition Republicans need in November, and it happened while gas prices climbed on the renewed fighting.

Treat one poll carefully. It is a single survey with a single question wording, and support that falls when you attach a price can rebound when the price falls. Even so, the direction lines up with everything else. On the day of the vote, Brent crude passed $100 a barrel for the first time since May. AAA put the national average for a gallon of gas just over $4. Democrats have led the generic ballot in nearly every survey taken this year.

Republicans are not hiding the problem. Majority Leader Steve Scalise said openly that Iran would come up at home, alongside the cost of living and border security. His answer was that the party needs to remind people it is working on all of it.

Democrats who served have standing here that few other candidates can claim. They can talk about deployment orders. An unclear mission does specific damage to a unit, and they have watched it happen. They also know who absorbs the cost of a war nobody voted to start. That is a real advantage and August is the month to use it.

But the plan has three problems, and none of them is small.

The first is Barrett. In Michigan’s seventh district, Democrats are picking a nominee on 4 August to challenge an Army veteran who has already voted twice to end the war. The contrast that works in most districts does not work in that one. Any Democrat who walks into a Lansing town hall planning to run on the war will find the incumbent standing on the same side of it.

The second is that Democrats are not unified either. Fetterman has broken with his party on these votes repeatedly. Back in February, 53 House Democrats voted against a resolution calling Iran the world’s largest state sponsor of terrorism. Most of the caucus voted for it. Representative Adam Smith summarized the split honestly, saying he agreed Iran is a bad actor and disagreed that war was the answer. That is a defensible position. It is also a paragraph, not a slogan.

The third is that the war could end. If the administration reaches a deal in August or September, a campaign built on an ongoing war has to be rebuilt in six weeks. Candidates who tie everything to the conflict are making a bet on its duration, and that is not a bet within their control.

The defense bill is the real fight. Representative Pat Ryan, an Army veteran, has argued that cutting off the money is the last tool Congress holds. Democrats have tried to turn the annual authorization into a vote on the war itself. Funding is the one thing that binds. So that fight will outlast the symbolic resolutions.

Watch which candidates raise the war unprompted. Plenty of veteran Democrats will answer a question about Iran if a voter asks one. Fewer will open with it, because affordability still tests better in most districts, and the two subjects now connect through gas prices.

Watch the four Republican crossovers as well. Republicans still hold a wide edge among veterans in the House, roughly 59 to 19, so a veteran-led anti-war bloc is not automatically a Democratic one. Massie has said he believes more Republicans would join if leadership brought up another measure. If that happens in September, the war stops being a partisan issue in exactly the districts where Democrats hoped to run on it.

There is also a court fight coming. Representative Gregory Meeks has filed a resolution that would let him sue to enforce the war powers measure Congress already adopted. He says he will force a vote on it once the House returns.

And watch the casualty reports. Four deaths since 17 July moved this from an argument about the Constitution to an argument about cost. Nothing in campaign politics is as unpredictable, or as consequential, as what happens next in a shooting war.

Our argument has been that military service gives Democratic candidates room to attack on national security without the usual penalty. This war is the cleanest test of that claim anyone could have designed.

The conditions are close to ideal. An unpopular conflict. A rising casualty count. A president losing his own base on the question. And a Democratic field carrying more veterans than any cycle since With Honor began counting in 2018. If the advantage is real, it should be visible by November.

The honest caveat is that we will not be able to separate the war from the economy. Gas prices rose because of the fighting. Voters who punish Republicans in November may be punishing the pump rather than the policy. No exit poll will cleanly divide those two. Anyone who claims afterward that veteran candidates won because of the war will be overreading the evidence, and that includes us.

August is where the case gets made. September is where we find out if anyone heard it.