Congress lawmaker Shashi Tharoor has stirred up a controversy with a new analogy on Prime Minister Narendra Modi -- one that he attributed to an "RSS source" of a journalist. Speaking at an event in Bengaluru, Mr Tharoor, whose book on PM Modi was recently released, said the "personality cult" of the Prime Minister did not sit well with many in the RSS establishment. The ideological mentor of the BJP, he said, also found it "extremely difficult" to "curb" PM Modi.