Sachin Pilot and other Congress rebels today challenged in the Rajasthan High Court a move to disqualify them as MLAs in a dramatic escalation of the party's crisis in Rajasthan. Mukul Rohatgi, who was appointed Attorney General after the BJP came to power in 2014, will be their lawyer. Notices served to them by Rajasthan Speaker CP Joshi yesterday asked them to explain by Friday "anti-party activities", failing which they would be disqualified. While team Pilot will be helped by the top government lawyer in the BJP regime, the Congress has fielded one of its sharpest legal experts, Abhishek Manu Singhvi.