7 November 2011: In addition to corruption, price rise and arrogance of power, UPA-2's problem is an adamant and inflexible prime minister. Manmohan Singh's inflexibility on the Indo-US nuclear deal forced the exit of its principal ally, the CPI-M/ Left, in 2008. On hindsight, the departure of the CPI-M/ Left was the worst thing to happen to the UPA, although conventional thinking would posit otherwise.