New Delhi, Apr 1 (ANI): The US ambassador to India Nancy Powell has resigned and will leave her post in May. The move comes following a row between the United States and India over the arrest and brief jailing of an Indian diplomat, Devyani Khobragade, in New York on a visa fraud charge. Khobragade, an official in the New York consulate, was accused of underpaying her housekeeper and lying about it on immigration forms. She has left the US.