There will be “catastrophic” consequences if Russia decides to use a nuclear weapon in Ukraine. This was stated by White House National Security Advisor Jake Sullivan. “If Russia crosses this line there will be catastrophic consequences for Russia. The United States will respond decisively. Now, through private channels, we have explained in more detail exactly what that would mean,” Sullivan said in an interview with NBC. “We want to establish the principle that there will be catastrophic consequences, but not engage in a rhetorical game of eye for an eye, ” he then added in an interview with ABC. ” The Russians must understand that we are preparing for any eventuality and we will do what is necessary to dissuade Russia from taking this step. And if they do, we will respond decisively, “Sullivan said. The US will impose further economic sanctions against Russia if the Kremlin goes ahead with its “farce” referendums in the territories of Ukraine occupied by Russian forces. In the coming days there will be “further strengthened sanctions, including sanctions against entities and companies outside of Russia that support the Russian war machine or support these sham referendums”.