Once again, Putin is rattling Russia’s nuclear sabers. This time, it’s by threatening Poland and Ukraine with the deployment of nuclear weapons in neighboring Belarus.

In response, there’s been plenty of hand ringing. What has yet to happen, however, is any serious effort to unplug US and European Union purchases of nuclear goods from Rosatom, the Russian nuclear firm responsible not only for making uranium fuel for power reactors, but for the development and production of Russian nuclear munitions.

As Andrea Stricker of The Foundation for the Defense of Democracies and I note in yesterday’s New York Post article, “Biden is letting America help fund Russia’s nuclear-weapon complex,” this is bizarre. So far, neither Congress nor the White House have put an end to this trade.

Meanwhile, Lithuania has catalyzed a debate within the European Union (EU) over nuclear sanctions by proposing that EU members wind down trade with Rosatom over the next 24 months. This makes sense but we should not wait for the EU to act.

Instead, the White House and Congress should encourage American nuclear utilities to buy additional uranium ore to feed existing enrichment plants operating in the US in Europe. Washington could also catalyze European Union to follow our lead by threatening secondary sanctions against foreign entities still buying from Rosatom. All of this would be sensible. What’s not is fretting about Putin’s nuclear threats while letting Western nuclear utilities fund the very entity developing and producing his nuclear arsenal.