Biggest Political gimmick is Sacrifice .Sonia Gandhi has successfully Done that In past. When Left betrayed the Govt Saying nuclear deal actually Its intension was to get out the Government due to fuel hike and Inflation .Left got the correct opportunity through So called Nuclear deal.
Now the condition is that People of India Is hating Left .BJP could have played the trump card of Sacrifice and help the Govt from falling. Early election is a huge extra budget on Govt and Public .BJP could have got the good support and sympathy of the public .That it is not a power hungry like SP and BSP.
