Congress leader Arvinder Singh Lovely today resigned as the chief of the party's Delhi unit over its alliance with the Aam Aadmi Party (AAP). Arvinder Singh Lovely said that several AAP ministers have been jailed over corruption charges, still the Congress formed an alliance with Arvind Kejriwal's party for the Lok Sabha elections amid opposition by party workers. Mr Lovely - in a letter to Congress Chief Mallikarjun Kharge - said that since he cannot protect the interests of the Delhi Congress workers, he sees no reason to continue as the chief of city's party unit.