In politics, there are no permanent enemies or friends and today Bengal Chief Minister Mamata Banerjee and Mukul Roy, her right hand man for 20 years, are parting ways -- and not amicably. The 63-year-old will meet Rajya Sabha Chairman, vice president Venkaiah Naidu to hand in his resignation from the upper house today. But it is his plan to hold a tell-all media conference later that's worrying the state's ruling Trinamool Congress.