Hungary is once again threatening to water down the European Union's sanctions regime against Russia by insisting that nine people be removed from a list of restrictive measures imposed on more than 1,300 individuals and 170 entities during several rounds of action in the wake of Moscow's invasion of Ukraine. Budapest once again wants to see the removal from the visa-ban and asset-freeze list of Alisher Usmanov, Pyotr Aven, and Viktor Rashnikov, several diplomatic sources with knowledge of the matter who aren't authorized to speak on the record…