The buzz over veteran leader Kamal Nath's possible switchover to the BJP has put the Congress in damage control mode, with party leaders reaching out to MLAs to ensure that the senior leader's exit does not turn into a mass exodus months ahead of the Lok Sabha polls. Madhya Pradesh Congress chief Jitu Patwari, Leader of Opposition in the Assembly Umang Singhar and other top leaders are speaking to MLAs one on one to hear out their grievances, according to sources. The focus is on MLAs, former legislators and Congress functionaries known to be close to Mr Nath and his son and MP Nakul Nath. A major chunk of MLAs switching over will weaken the Congress in Madhya Pradesh and also shield the turncoats from the anti-defection law.