Americans don’t agree on much today, but overwhelming majorities agree that President Donald Trump’s war in Iran was and is a mistake.

Never popular to start with, the war has done nothing but lose public support in the almost three months it’s been underway. The latest polls show opposition by well over 60% of the public. While there is predictably sharp disagreement between Democrats and Republicans on the issue, almost three-quarters of nonpartisan independents oppose the war, according to a recent New York Times/Siena poll.

Not only is this aimless and economically damaging war deeply unpopular, but it is now arguably illegal. The War Powers Act of 1973 says the president must end any unilateral military operation within 60 days of the start of hostilities unless Congress specifically authorizes it to continue. The current hostilities began at the end of February — 80 days ago at this writing.

Yet congressional Republicans have repeatedly turned back attempts to invoke the Act, most recently with a tie vote in the House last week.

Some Republicans have started crossing over to demand accountability from the administration. But not Missouri’s six GOP House members and both its senators. They are putting their loyalty to Trump ahead of adherence to the law and service to their own constituents. Those constituents, straining under gas prices inflated by Trump’s war, deserve better.

From the day Trump attacked Iran without a word to Congress or any ally but Israel, he has failed to offer a consistent rationale for it. Early on, the explanation shifted constantly: Spawning regime change, protecting Iranian civilians, confronting proxy terrorism, protecting the world’s oil supply, defanging Iran militarily and promoting Israeli interests all were on rotation, often daily or even hourly.

The administration lately has settled on the argument that the war is necessary to prevent Iran from developing nuclear weapons. That would certainly be a valid reason to attack a violent theocracy like Iran, but for one inconvenient fact: Trump announced on social media less than a year ago that an earlier U.S. military operation there had already “COMPLETELY DESTROYED!” Iran’s nuclear capabilities and that any suggestion to the contrary was “FAKE NEWS.”

Meaning, we guess, that Trump’s current rationale for the war is … fake news?

Such incoherence, typical from this president, is especially dangerous in the arena of war. In addition to spawning sky-high gasoline prices because of the standoff in the Strait of Hormuz, this debacle of a war has damaged America’s relations with its appalled allies and eroded its global standing with everyone. And that’s before you even get to the thousands of war fatalities — more than a dozen Americans among them so far.

Not since World War II has Congress fulfilled its obligation to decide when to send U.S. forces into wars, abdicating that power to presidents of both parties in a way the Constitution never envisioned.

The War Powers Act has at least provided a backstop to prevent ceaseless presidential warmongering with no accountability. But now this personality-cult of a Congress is abdicating that, too.

For its part, the administration claims that the current, fragile ceasefire doesn’t count toward the 60-day limit after which the president must seek congressional approval to continue hostilities. That’s nonsense. Section 5 of the War Powers Act states plainly that such approval must be sought “within sixty calendar days” of the start of a military campaign, and contains not a word about pausing or resetting that clock with a temporary ceasefire.

Trump also claims (as other presidents have) that the Act itself is unconstitutional. If he wants to make that claim in court, then make it. In the meantime, he doesn’t get to just ignore a federal law that is currently in force.

Sens. Josh Hawley and Eric Schmitt, and Reps. Ann Wagner, Bob Onder, Mark Alford, Eric Burlison, Sam Graves and Jason Smith, are all supposed to work for the people of Missouri, not for a rogue president with an itchy trigger finger. Members of Congress, do your jobs, already.