The Congress today rallied behind its senior leader and former Union Minister P Chidambaram, who is wanted by two investigative agencies in a corruption case. A lookout notice was issued this morning against the former minister as CBI and the Enforcement Directorate failed to locate him since last evening. While Rahul Gandhi called it a "disgraceful misuse of power", his sister Priyanka Gandhi said the former minister was being "shamefully hunted down".