The numbers tell a troubling story about courage and conviction in Washington. When President Trump threatened to eradicate an entire civilization unless Iran reopened the Strait of Hormuz, only a handful of Republicans in Congress found their voices to object.

This is the kind of moment that tests the mettle of elected representatives, and frankly, most failed that test.

The president had drawn a hard line in the sand, giving Iran until 8 p.m. Tuesday to reopen the strait or face devastating attacks on civilian infrastructure. The Strait of Hormuz, for those keeping score at home, is one of the world’s most critical chokepoints for oil trade. Closing it has global consequences. But threatening to destroy a civilization? That is something else entirely.

Twelve hours before his deadline, with the clock ticking toward what could have been an unprecedented catastrophe, the president posted a chilling message on Truth Social. “A whole civilization will die tonight, never to be brought back again. I don’t want that to happen, but it probably will,” he wrote.

Let that sink in for a moment. The President of the United States, speaking for all Americans, threatened genocide as a negotiating tactic.

Representative Nathaniel Moran of Texas became the first Republican to break ranks Tuesday afternoon, stating plainly that he does “not support the destruction of a ‘whole civilization.'” He added that “how we protect the lives of the innocent is just as important as how we engage the enemy.” Those words should not require courage to speak, yet in today’s political climate, apparently they do.

Senator Lisa Murkowski of Alaska joined him, declaring that the president’s threat “cannot be excused away as an attempt to gain leverage in negotiations with Iran.” She called for immediate de-escalation before the situation spiraled beyond control.

Representative Kevin Kiley of California, who recently left the Republican Party to become an independent, put it bluntly: “The United States does not destroy civilizations. Nor do we threaten to do so as some sort of negotiating tactic.”

Meanwhile, the silence from the vast majority of congressional Republicans was deafening. This stands in sharp contrast to the more than 70 Democrats who called for the president’s removal through the 25th Amendment or impeachment. Former House Speaker Nancy Pelosi minced no words, calling Trump’s instability “more clear and dangerous than ever.”

Representative John Larson of Connecticut even introduced articles of impeachment, though with Republicans controlling Congress, that effort has no realistic path forward.

Perhaps most striking was the condemnation from former stalwart Trump supporters outside Congress. Former Representative Marjorie Taylor Greene and conspiracy theorist Alex Jones both called for the president’s removal, a development that speaks volumes about how far beyond the pale this threat was perceived.

Less than two hours before his self-imposed deadline, President Trump announced a two-week ceasefire, contingent on Iran’s complete and immediate reopening of the Strait of Hormuz. The threatened attack was postponed, at least temporarily.

The question that lingers is not whether the president made the right call in backing down. The question is why so few Republicans were willing to stand up and say that threatening to destroy an entire civilization crosses a line that no American president should ever approach. When the history books are written about this moment, that silence will speak louder than any threat ever could.

Related: Rep. John Larson Launches Impeachment Effort Targeting Trump Foreign Policy Actions