The Biden administration is preparing to impose additional sanctions on Russia over the poisoning of jailed opposition leader Alexey Navalny

, US National Security Advisor Jake Sullivan told CNN Sunday. “We are preparing another package of sanctions to apply in this case. We’ve shown all along the way that we are not going to pull out our punches, whether it’s on Solar Winds, or election interference, or Navalny when it comes to responding to Russia’s harmful activities.”