Shiv Sena (UBT) president Uddhav Thackeray on Sunday criticised Prime Minister Narendra Modi over his scheduled visit to the US, and asked why he was going abroad instead of visiting Manipur to resolve the crisis in the violence-hit north-eastern state.Addressing a state-level convention of his party, the first since the rebellion split Shiv Sena last year, he also dared the Bharatiya Janata Par