Activist turned politician Arvind Kejriwal, who planned to lead a protest march to the Prime Minister's residence today to push for action against Law Minister Salman Khurshid, has been stopped by the police at Janpath. Mr Kejriwal, who launched his political party recently, is demanding the minister's resignation over allegations that an NGO headed by him and run by his wife siphoned off lakhs of rupees meant for physically challenged people.