New Delhi [India], September 19 (ANI): Aam Aadmi Party on Thursday said that Rajya Sabha MP Atishi will take oath as the Chief Minister of Delhi on September 21. “Atishi will take oath as the Chief Minister of Delhi on September 21, other ministers will also take their oaths alongside her,” the Aam Aadmi Party said in a statement. Aam Aadmi Party (AAP) leader Atishi, who has staked claim to become the next Delhi Chief Minister, said on Tuesday that she is happy about the trust posed in her by the outgoing CM Arvind Kejriwal but also sad that he has resigned from his post. Atishi told reporters…