Liz Truss has previously named Argentina's president, after being asked who her favorite conversation leader was

As of my last update in December 2023, there seems to be some confusion in your question about Liz Truss and Argentina's president. Liz Truss, a British politician who briefly served as the Prime Minister of the United Kingdom in 2022, may have discussed various international leaders during her political career, but there is no widely reported instance where she specifically named the president of Argentina as her favorite world leader in a conversation.

During her time in office and in various roles within the UK government, Truss dealt with numerous international issues and had interactions with various global leaders. However, any specific admiration or preference for Argentina’s president might need clarification or could be a misunderstanding of a particular statement or interview.

For accurate and current details, checking the latest updates from reliable news sources like BBC News directly would provide the most current and contextually accurate information about any statements Liz Truss has made regarding international leaders.