File photo: Delhi Lt Governor Najeeb Jung with Chief Minister Arvind Kejriwal

Arvind Kejriwal has a new contesting claim to his powers from Lieutenant Governor Najeeb Jung. The two men - one the Chief Minister of Delhi, the other the representative of the Centre in the capital, share a working relationship soused with suspicion, mutual distrust, and accusations of administrative over-reach. Mr Kejriwal, who won a record victory in February, has gone to court to restrain the Lieutenant Governor from making and enforcing decisions that are the right of an elected government.In the latest sign that he's not tired of pushing back, the Lieutenant Governor has said that Mr Kejriwal has incorrectly ordered an inquiry into an alleged scam that took place during the first of Sheila Dikshit's three terms as Chief Minister of Delhi. The contract to check and issue "Fitness certificates" for public transport using CNG was allegedly manipulated; more tests were conducted than needed, and a 100-crore scam was reportedly constructed with the collusion of government officers.The Lieutenant Governor says that Mr Kejriwal's inquiry is illegal and the scam is being investigated by the Anti-Corruption Bureau. Mr Kejriwal has already asked the Delhi High Court to declare that the agency should report to him, and not Mr Jung.Mr Kejriwal's administration also points out that in 2013, the Lieutenant Governor had refused to allow investigators to prosecute three former government officials who, according to the Anti-Corruption Bureau, were part of the scandal.Mr Kejriwal says that the Lieutenant Governor acts as "an agent of the BJP" to control a city in which the party won just three seats. Mr Kejriwal's Aam Aadmi Party won the other 67.The Centre and Mr Jung say that as a Union Territory, key matters of Delhi's administration rest with the union government and its representative, the Lieutenant Governor.