New Delhi: The Aam Aadmi Party, which recently formed the government in Delhi and has won huge public support for its anti-corruption stand, is now tackling allegations that its Law Minister, Somnath Bharti, tried to influence a witness and tamper with evidence in a case he handled last year. br br The Congress and the BJP say the lawyer-turned-minister must resign immediately or be removed from office by Chief Minister Arvind Kejriwal, who founded the Aam Aadmi Party or AAP a year ago.