One vote.

That's how close the United States Senate came Thursday to advancing another attempt to tell Donald Trump something that should not be controversial:

Presidents don't get to wage an indefinite war by themselves.

The Senate voted 49–50 on a resolution aimed at forcing Trump to end U.S. military hostilities against Iran unless Congress explicitly authorized them.

It failed.

Again.

Four Republicans — Susan Collins, Lisa Murkowski, Rand Paul and Thom Tillis — joined Democrats in supporting the effort.

Democratic Sen. John Fetterman voted against it.

And so America's war with Iran continues without the specific congressional authorization the resolution demanded.

Remember When This Was Supposed to Be Short?

The United States entered the conflict with Iran in late February.

Donald Trump initially predicted the war would last roughly four or five weeks.

It has now lasted more than six months.

American forces and Iran have continued exchanging fire.

Regional oil shipments have been disrupted.

Energy prices have climbed.

Billions of dollars have been spent.

And Americans still haven't been given a convincing answer to the most basic question asked about every war:

How does this end?

The Trump administration has not presented Congress with a clear exit strategy.

Instead, Congress keeps holding votes about whether Congress should exercise the authority the Constitution already gives it.

And Congress keeps coming up short.

Congress Is Supposed to Matter Here

The Constitution doesn't make the president a king who can simply decide how long America remains at war.

Congress has the power to declare war.

After the disasters and abuses surrounding Vietnam, Congress passed the War Powers Resolution of 1973 specifically to restrain presidents from maintaining prolonged military conflicts without congressional authorization.

The law requires presidents to notify Congress shortly after introducing American forces into hostilities and establishes a 60-day limit for unauthorized military involvement, with additional time available for withdrawal.

That deadline has passed.

Republican Sen. Thom Tillis specifically cited that fact when explaining his support for Thursday's measure.

The administration notified Congress in July that military action had restarted.

More than 60 days later, American forces remain engaged.

At some point, Congress has to decide whether the War Powers Resolution actually means anything.

Even Republicans Are Beginning to Break

Perhaps the most revealing part of Thursday's vote wasn't that the resolution failed.

It was how close it came to succeeding.

Collins, Murkowski and Paul have previously supported efforts to restrain Trump's war powers.

This time they were joined by Tillis.

And the rebellion isn't confined to the Senate.

The House has repeatedly voted on resolutions seeking to restrain Trump's Iran operations, with a growing number of Republicans willing to break with their president.

Some Republican candidates facing competitive elections have begun publicly calling for the war to end.

That shouldn't be surprising.

Wars become considerably less attractive politically when voters start paying for them.

And Americans Are Paying

The costs aren't theoretical anymore.

The Congressional Budget Office has estimated that continuing the Iran war could cost the United States roughly $2 billion to $3 billion every month.

That's billions of dollars every few weeks.

Meanwhile, disruptions to energy supplies have contributed to higher fuel prices.

Those prices don't remain conveniently confined to gas stations.

Diesel powers trucks.

Trucks deliver food.

Farm equipment burns fuel.

Airlines buy enormous quantities of jet fuel.

Manufacturers depend upon transportation.

Eventually the cost works its way through the economy and lands exactly where it always lands:

On ordinary Americans.

The people paying for this war deserve to know what victory is supposed to look like.

What Exactly Is the Plan?

This is the question Congress should be demanding that the administration answer.

What is the objective?

What constitutes victory?

What conditions end American military operations?

How much will it cost?

How long will American troops remain involved?

And what happens if Iran simply refuses to cooperate?

Those aren't anti-war questions.

They're the questions responsible governments are supposed to answer before committing a country to prolonged warfare.

Instead, Americans were initially told this would be a relatively short conflict.

Six months later, we're still here.

One Vote

Thursday's resolution wasn't going to magically end the conflict.

As a concurrent resolution, it also faced significant questions about whether it could legally bind the president without becoming law. Presidential administrations of both parties have disputed that provision of the War Powers Resolution for decades.

But politically, the vote mattered.

It asked senators a remarkably straightforward question:

Should an American president be allowed to continue a months-long war without Congress specifically authorizing it?

Forty-nine senators said Congress should assert itself.

Fifty effectively allowed the status quo to continue.

And somewhere tonight, American service members remain deployed in a war that Donald Trump once suggested would last four or five weeks.

The war has now lasted more than six months.

Congress has held vote after vote.

The money keeps flowing.

The fuel prices keep climbing.

And America is still waiting for someone to explain how this ends.