Lawrence O’Donnell invoked Donald Trump’s youngest son, 19-year-old Barron Trump, while delivering a blistering critique of the president’s war on Iran.

The MS NOW host highlighted the stark contrast between the families whose children are being sent into combat and the privilege of eligible Trump family members, who are not.

O’Donnell began: “The Trump family’s flawless record of avoiding military service would be unremarkable if Donald Trump never started a war. But when your father starts a war, an illegal and unconstitutional war, and you are of the age that is eligible to fight and die in your father’s war, what do you do?”

He then answered his own question:

“Killed in the line of duty is always agonizingly tragic for the families,” said O’Donnell. “But when those doorbells were ringing in World War II, at least the families knew what the soldiers were fighting for when they died.”

But the president’s “reason for starting his unconstitutional and illegal war changes by the hour, just like everything else Donald Trump has ever tried to explain,” he added, meaning the relatives of fallen troops do not know for what reason they have died.

Watch O’Donnell’s full monologue here: