Top Congress and BJP leaders will launch a blitzkreig in Karnataka from tomorrow seeking to give a big thrust to the chances their parties in the April 17 Lok Sabha polls that holds out the prospect of a tight race between the two principal players. br br Rahul Gandhi will address meetings in Bellary and Mangalore tomorrow, Congress announced today, as the ruling party in the state is going all out to reverse the trend of the 2009 polls which saw the party get six seats and BJP 19. JDS had bagged three seats out of the 28.