Why the US won’t send troops to Ukraine

In 1990, Iraq invaded Kuwait in a naked war of territorial aggression. The next year, the US and an allied coalition intervened under the auspices of the United Nations Security Council, repulsing the Iraqi invasion. Today, as Russia is engaged in a similar aggressive war against Ukraine, there is no similar American effort in the offing — even as Ukrainian leaders have pleaded for Western assistance.

There are many dissimilarities between the situations in 1991 and 2022, but the biggest one is this: Saddam Hussein, rather famously, did not have nuclear weapons. Vladimir Putin has approximately 6,000 of them. And that makes all the difference.

Both before the invasion and afterward, the Biden administration has consistently ruled out the deployment of US troops. “Let me say it again: Our forces are not — and will not — be engaged in the conflict with Russia in Ukraine,” the president said in a Thursday address. Despite the warnings of American involvement from commentators on the Trumpist right and “anti-imperialist” left, there are no signs of this policy changing. Nuclear weapons are the chief reason why.