The war with Iran is hanging by the slimmest of margins: One vote. That’s the entire margin that saved President Donald Trump from a House resolution ordering him to end the war.

The House voted 214 to 213 to reject the resolution, almost entirely along party lines, with one Republican, Thomas Massie (R-Ky.), voting for the measure, and one Democrat, Jared Golden (D-Maine), voting against it.

Gregory Meeks (D-N.Y.) proposed the measure “to remove United States Armed Forces from hostilities against the Islamic Republic of Iran … unless explicitly authorized” by Congress.

Meeks took the floor to blast the president for dragging the country into a widely unpopular war — and to convince his colleagues to vote for the resolution.

“Donald Trump has dragged the American people into a war of choice, launched without congressional authorization,” he said.

Meeks added that Trump has no coherent strategy and no endgame.

“Every day we delay, we inch closer to a conflict with no exit ramp,” he declared.

Too bad for Meeks, only half the House lent him an ear.

As for the war’s popularity, while a CBS News poll found that 60 percent of Americans oppose the war, other reports show that 70 percent of Trump’s own party backs the campaign against Iran.

The Senate defeated a similar measure, 52 to 47, Wednesday.

For now, it looks like Congress is backing the war — but that support is hanging by a thread.